stem是什么意思

短语搭配

(1)stem from起源于；源于；来自

(2)from stem to stern从船头到船尾

(3)stem cell干细胞

(4)drill stem钻杆

(5)stem ginger优等蜜饯姜

(6)stem turn半犁式转弯

(7)stem stitch绳状针脚

(8)stem cells干细胞

(9)brain stem脑干

(10)neural stem cell神经干细胞

(11)valve stem阀杆

(12)stem flow茎流；株流

(13)stem the current堵住

(14)stem tide阻止潮流

(15)stem rise茎上升

双语例句

(1)I have 42 hours to carry stem cells (干细胞) in my little box because I've got two ice packs.

我用小箱子携带干细胞42个小时，因为我有2个冰包。

(2)The stem cells are harvested from a donor (捐献者) to be implanted in the patient.

从捐赠者身上提取干细胞到移植到病人体内。

(3)I have 42 hours to carry stem cells (干细胞) in my little box.

我用小箱子携带干细胞42个小时。

(4)I am Peter Hodes, a volunteer stem cell courier.

我是Peter Hodes，我是一名干细胞快递志愿者。

(5)In this box are some stem cells that are urgently needed for a patient.

这个盒子里是一些病人急需的干细胞。

(6)Men are believed to be better able to excel in STEM disciplines.

人们认为男性在科学、技术、工程和数学教育学科中会更突出。

(7)When they reach their full height, flowers grow out from the stem.

当它们长到最高的时候，花就从茎上长出来。

(8)The plant propagates freely from stem cuttings.

这种植物通过枝干扦插便可得以繁殖。

(9)Many European words stem from this linguistic root.

许多欧洲词汇源于这个词根。

(10)A nurse did her best to stem the bleeding.

那护士竭尽全力来止血。

同义词

n. 干；茎；船首；血统

vt. 阻止；除去…的茎；给…装柄

vi. 阻止；起源于某事物；逆行

同根词

词根 stem

(1)stemmed adj. 去掉茎或梗的；有茎或梗的；装有…柄的v. 起源于（stem的过去分词形式）；除去…的茎；给（假花等）装梗

(2)stemless adj. 无茎的；无梗的

(3)stemmer n. 抽梗机，除梗器；抽梗工人

释义

n.

the main body or stalk of a plant or shrub, typically rising above ground but occasionally subterranean

（植物、灌木的）茎，干。

the stalk supporting a fruit, flower, or leaf, and attaching it to a larger branch, twig, or stalk

（支撑果实、花朵、叶子的）梗。

a long, thin supportive or main section of something

把，柄；干

the main stem of the wing feathers.

翅膀羽毛的主干。

the slender part of a wine glass between the base and the bowl

（酒杯杯身与底座之间的）柄脚。

the tube of a tobacco pipe

烟斗柄。

a rod or cylinder in a mechanism, for example the sliding shaft of a bolt or the winding pin of a watch

（机械装置的）阀杆，导杆，棒。

a vertical stroke in a letter or musical note

（文字的）干线；（音符的）符干。

Grammar the root or main part of a noun, adjective, or other word, to which inflections or formative elements are added

【语法】 词干。

archaic or poetic/literary the main line of descent of a family or nation

〈古或诗／文〉 家谱，系谱；血统

the Hellenic tribes were derived from the Aryan stem.

那些希腊部落起源于雅利安血统。

the main upright timber or metal piece at the bow of a ship, to which the ship's sides are joined at the front end

船头，艏；艏材，艏柱。

US informal a pipe used for smoking crack or opium

〈美， 非正式〉 鸦片烟枪。

v.

[no obj.](stem from)originate in or be caused by

起源于

many of the universities' problems stem from rapid expansion.

大学的许多问题来源于快速扩张。

[with obj.]remove the stems from (fruit or tobacco leaves)

去掉（水果、烟叶的）干（或茎、梗）。

[with obj.](of a boat)make headway against (the tide or current)

（船）逆流而行。

v.

[with obj.]stop or restrict (the flow of something)

堵住，塞住；制止（流动）

a nurse did her best to stem the bleeding.

　那护士竭尽全力来止血。

stop the spread or development of (something undesirable)

遏制，制止

an attempt to stem the rising tide of unemployment.

遏制失业势头上升的努力。

[no obj.]Skiing slide the tail of one ski or both skis outwards in order to turn or slow down

【滑雪】 向外转动（滑雪屐）以便转弯（或减速）。

短语

from stem to stern from the front to the back, especially of a ship 从头到尾；从船头到船尾 surges of water rocked their boats from stem to stern. 汹涌的潮水使船从头到尾摇晃起来

易错必背词

stem cells 干细胞

(1)I have 42 hours to carry stem cells in my little box.

我还有42小时把干细胞装进我的小盒子里。[全国卷I 2016 高考 阅读理解]

stem from ... 起源于...；根源是...

(1)All other major differences between us likely stem from language.

我们之间所有其他的主要差异可能源于语言。[上海 2022 语法填空]

类似拼写词

stem n. 茎；干；把；柄；词干；船头；艏；艏材；艏柱；鸦片烟枪

item n. 条；项；项目；条款；一条消息；一则信息；一项账目

steam n. 蒸汽；水蒸气；动力；蒸汽机车；水汽；汽力；气雾；推动力；蒸汽膨胀力；力量

step n. 跨步；步子；梯级；台阶；措施；手段；音级；全音；半音；跑步有氧健身法

seem v. 好像；似乎；做不到

词源

"Old English stemn, stefn, of Germanic origin; related to Dutch stam and German Stamm. Sense 4 is related to Dutch steven, German Steven.Middle English （in the sense ‘to stop, delay’）：from Old Norse stemma, of Germanic origin. The skiing term （early 20th cent.） is from the German verb stemmen."

考纲分布

近4年出现14次

重要程度: 5星

100%; n 茎; 主干

考纲释义

( 1)n. 茎; 主干

英文释义：the main body or stalk of a plant or shrub

真题例句：

Tthe stems fail to grow away from the earth's gravity.

茎在地心引力的作用下无法生长。[2020年 福建省卷 阅读理解]

He had planted Dr. Williams's quick-growing seedlings in it, but none of the stems were showing.

他把威廉姆斯博士的快速生长的幼苗种在里面，但没有一个茎干露出来。[2020年 广州市 阅读理解]

The stems weren't growing upward and the roots weren't growing downward.

茎没有向上生长，根也没有向下生长。[2020年 广州市 阅读理解]

考纲分布

近8年出现5次

重要程度: 5星

100%; n/v 茎; 主干; 去茎叶

考纲释义

( 1)n/v. 茎; 主干; 去茎叶

英文释义：the main body or stalk of a plant or shrub

真题例句：

I am Peter Hodes, a volunteer stem cell courier.

我是Peter Hodes，我是一名干细胞快递志愿者。[2016年 全国卷 阅读理解]

考纲分布

近6年出现8次

重要程度: 5星

87.5%; n/v 茎; 主干; 去茎叶

12.5%; v (问题/怒气)起源于

考纲释义

( 1)n/v. 茎; 主干; 去茎叶

英文释义：the main body or stalk of a plant or shrub

( 2)v. (问题/怒气)起源于

英文释义：originate in; or be caused by

真题例句：

The innovative ideas stemming from curiosity.

源于好奇心的创新想法。[2021年 CET4 阅读理解C]

考纲分布

近6年出现9次

重要程度: 5星

55.56%; n/v 茎; 主干; 去茎叶

44.44%; v (问题/怒气)起源于

考纲释义

( 1)n/v. 茎; 主干; 去茎叶

英文释义：the main body or stalk of a plant or shrub

( 2)v. (问题/怒气)起源于

英文释义：originate in, or be caused by

真题例句：

The solution to great team performance stems from a willingness to recruit others who could direct their passion towards the third phase of entrepreneurialism.

优秀团队绩效的解决方案。，源于愿意招募那些能够将他们的激情引向创业第三阶段的人。[2021年 CET6 听力]

This kind of thinking stems from our misclassification of drawing as an art form.

这种想法源于我们将绘画错误地归类为一种艺术形式。[2021年 CET6 阅读理解]

考纲分布

近11年出现3次

重要程度: 5星

33.33%; v 起源于

33.33%; v 阻止; 遏制

33.33%; n/v 茎; 主干; 去茎叶

考纲释义

( 1)v. 起源于

英文释义：originate in, or be caused by

真题例句：

Some growth stems from a commitment by governments and farsighted businesses to fund cleaner energy sources.

一些增长源于政府和有远见的企业为清洁能源提供资金的承诺。[2018年 英语二 阅读理解A]

( 2)v. 阻止; 遏制

真题例句：

Stemming climate change, for example, is as much about changing consumption patterns and promoting tax acceptance as it is about developing clean energy.

例如，遏制气候变化不仅在于发展清洁能源，也在于改变消费模式和促进人们接受纳税。[2013年 英语一 阅读理解B]

( 3)n/v. 茎; 主干; 去茎叶

英文释义：the main body or stalk of a plant or shrub

真题例句：

Though plants lack brains, the firing of electrical signals in their stems and leaves nonetheless triggered responses.

虽然植物没有大脑，但它们的茎和叶发出的电信号却触发了反应。[2022年 英语一 完型填空]

(1)I wish we could persuade you to help us stem the tide of change.

我希望我们能说服你抵御改变。《Downton Abbey Season 6》《唐顿庄园 第六季》

(2)You know, both selective mutism and an inability to separate from one's mother can stem from a pathological fear of women.

无论是选择性缄默症还是无法离开母亲独自生活，都可能是源于对女性的病理性恐惧。《The Big Bang Theory Season 2》《生活大爆炸 第二季》

(3)But to be clear, when you're making these decisions for me, give my heart at least 24 hours to recover before you cut me stem to stern.

但是我先声明，如果你要替我做这些决定，在你决定把我从头到脚剖开之前，请先让我的心脏休息24小时。《Greys Anatomy Season 10》《实习医生格蕾 第十季》

(4)Priya, if you're experiencing any tension or awkwardness, it may stem from the fact that Leonard and Penny used to, if I may quote Howard, "do the dance with no pants." Sheldon! Really?

普丽娅，如果你觉得有些紧张或者尴尬，很可能是因为莱纳德和佩妮以前曾经，用霍华德的话来说叫做"赤裸共舞"。谢尔顿！你非得这么说吗？《The Big Bang Theory Season 4》《生活大爆炸 第四季》

(5)Check it out, no one will tell me where Emily is, so I'm gonna send 72 long-stem, red roses to Emily's parent's house, one for each day that I've known and loved her.

听我说，大家都不肯说艾蜜莉在哪里，我决定买72朵长茎红玫瑰送去艾蜜莉爸妈家，每朵代表我认识她，并且深爱她的每一天。《Friends Season 5》《老友记 第五季》