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TOEFL IELTS BNC: 4527 COCA: 3414
stem
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noun [C] /stem/
singularstem
pluralstems
  1. 1
    the long thin central part of a plant from which the leaves and flowers grow （植物的）茎，柄，梗

    Cut the stems to ground level in winter. 冬天的时候把茎剪到齐地面高。

     Synonyms and related words
    Parts of plants: aerial root, anther, beanstalk...
  2. 2
    the long thin part of a wine glass that joins the bowl to the base （高脚酒杯的）柄脚
     Synonyms and related words
    Types of cup or glass: beaker, chalice, cup...
  3. 3
    the long narrow part of a pipe used for smoking 烟斗柄
     Synonyms and related words
    Tobacco, cigarettes, cigars and pipes: baccy, bidi, bong...
  4. 4
    linguistics the part of a word that does not change when an ending is added, for example ‘work' in the word ‘working' 词干
     Synonyms and related words
    Linguistic terms relating to word formation and phrase building: affix, affixation, anaphora...
stem
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verb [T] /stem/
present tense
I/you/we/theystem
he/she/itstems
present participlestemming
past tensestemmed
past participlestemmed
  1. to stop something from spreading or increasing, especially something bad 阻遏，制止（尤指坏事）

    These policies have helped to stem population loss. 这些政策已起到了阻遏人口流失的作用。

    stem the flow/tide/flood (of) :

    Police are attempting to stem the rising tide of rural crime. 警方正试图遏制农村地区犯罪率上升的趋势。

     Synonyms and related words
    To limit or control something or someone: draw a line in the sand, limit, control...
    1. a.
      formal to stop liquid from flowing 止住，阻止（液体流动）

      Joan breathed in deeply, trying to stem her tears. 琼深吸了一口气，想忍住不让泪水流下来。

       Synonyms and related words
      To stop something from continuing or developing: interfere with, inhibit, disrupt...

phrasal verbs

STEM
noun [U] education /stem/
  1. science, technology, engineering and maths: the sciences as educational subjects

    Studying STEM subjects leads directly to a huge variety of exciting and rewarding career opportunities.

     Synonyms and related words
    Scientific areas of study:aerodynamics, aeronautics, anatomy...
TOEFL IELTS BNC: 4527 COCA: 3414
stem

noun

ADJECTIVE | VERB + STEM | STEM + VERB | PREPOSITION | PHRASES ADJECTIVE➤long, tall長莖；高莖▸➤short短莖▸➤thick粗莖▸➤slender, thin細長的莖；細莖➤main主莖▸➤flexible, strong柔韌的莖；強壯的莖▸➤brittle, weak易斷的莖；柔弱的莖➤flowering, woody花枝；木質莖➤flower, plant花莖；植株莖▸➤iris, rose, etc.鳶尾花莖、玫瑰花莖等VERB + STEM➤break, cut, cut back, prune, prune back, remove, shorten, trim折斷莖幹；修剪莖幹；剪除莖幹；剪短莖幹◇When the bush has finished flowering, cut back all the stems.等這叢灌木開完花後，把所有的莖幹都修剪一下。STEM + VERB➤break莖幹折斷PREPOSITION➤on a/the stem在莖幹上◇There are several leaves on each stem.每一根莖上都有幾片葉子。PHRASES➤the base of the stem莖的基部◇Cut half an inch off the base of each stem.從每根莖的基部剪去半英寸。
TOEFL IELTS BNC: 4527 COCA: 3414
stem verb
⇨ stop 3

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