stem

听听怎么读

英 [stem]

美 [stɛm]

是什么意思

（花草的）茎；词干；（高脚酒杯的）脚；烟斗柄

vt.

遏制[阻止]（液体的流动等）；阻止；封堵；遏止

变形

复数：stems过去式：stemmed过去分词：stemmed现在分词：stemming第三人称单数：stems

双语释义

n.(名词)

[C] (花草的)茎,(树木的)干 main central part of a plant, bush or tree coming up from the roots, from which the leaves or flowers grow
[C] 词干 root or main part of a noun or verb from which other parts or words are made, e.g. by altering the endings

v.(动词)

vt. 遏制〔阻止〕(液体的流动等) restrain or stop (the flow of liquid, etc.)
vi. 起源,由…造成 originate or be caused by sth

英英释义

stem[ stem ]

n.
- (linguistics) the form of a word after all affixes are removed
  "thematic vowels are part of the stem"
  同义词：rootroot wordbasethemeradical
- a slender or elongated structure that supports a plant or fungus or a plant part or plant organ
  同义词：stalk
- cylinder forming a long narrow part of something
  同义词：shank
- the tube of a tobacco pipe
- front part of a vessel or aircraft
  同义词：bowforeprow
- a turn made in skiing; the back of one ski is forced outward and the other ski is brought parallel to it
  同义词：stem turn
v.
- grow out of, have roots in, originate in
  "The increase in the national debt stems from the last war"
- cause to point inward
  "stem your skis"
- stop the flow of a liquid
  同义词：stanchstaunchhalt
- remove the stem from
  "for automatic natural language processing, the words must be stemmed"

学习怎么用

词汇搭配

用作名词 (n.)

名词+～

verb stem动词词干

介词+～

on a stem在茎上

～+介词

a stem of a flower花梗

用作动词 (v.)

～+名词

stem a stream堵住溪水
stem the spread制止蔓延

词组短语

stem cell干细胞，骨髓干细胞

stem from起源于

brain stem脑干

drill stem钻柱；钻杆；钻具

main stem[美俚]干线；主街

valve stem【机】阀杆

from stem to stern完全；从头到尾

stem rust杆锈；茎锈病

hemopoietic stem cell造血干细胞

stem borer蛀茎虫；天牛；蔗螟；茶天牛

rising stem升杆

stem seal阀杆密封；芯轴密封

更多收起词组短语

双语例句

用作名词(n.)

Don't eat the stem of a mushroom.
不要吃蘑菇的梗。
This is a plant stem that has been pithed.
这是一根已经除去木髓的植物的茎。
Crime and punishment grow out of one stem.
罪与罚本是同茎生。
She bought some roses with long stems.
她买了一些枝干很长的玫瑰花。
The liner has been refitted from stem to stern.
那艘班轮已经全面整修。

用作不及物动词(vi.)

Your errors stem all from your carelessness.
你犯的错误全都是由于你的粗心。

用作及物动词(vt.)

Our ship stemmed on against the current.
我们的船逆流而上。

权威例句

Stem cells, cancer, and cancer stem cells.
Tumour stem cells and drug resistance.
Wnt signalling in stem cells and cancer.
Stem Cells in Cancer and Cancer Stem Cells - Stem Cells - Chapter 10
Marrow Stromal Cells as Stem Cells for Nonhematopoietic Tissues
Human mesenchymal stem cells modulate allogeneic immune cell responses.
The human adipose tissue is a source of multipotent stem cells
Human embryonic stem cells: the real challenge for research as well as for bioethics is still ahead of us.
Core transcriptional regulatory circuitry in human embryonic stem cells.
The epithelial-mesenchymal transition generates cells with properties of stem cells.

同义词