1 the main long thin part of a plant above the ground from which the leaves or flowers grow 树干;茎;梗
☞pictures at flower and on page C2 见flower及C2页插图
2 (grammar语法) the main part of a word onto which other parts are added 词干:
‘Writ-’ is the stem of the words ‘write’, ‘writing’, ‘written’ and ‘writer’.writ-是write、writing、written和writer的词干。
stem²
/stem ||; stɛm/verb
[T] (stemming;stemmed) to stop sth that is increasing or spreading 阻止(某物增加或蔓延)
stem from sth (not used in the continuous tenses 不用于进行时) to be the result of sth 是…的结果;由…导致或引起
Although this verb is not used in the continuous tenses, it is common to see the present participle (= -ing form) He was treated for depression stemming from his domestic and business difficulties. 虽然这个动词不用于进行时,但它的现在分词还是常见:He was treated for depression stemming from his domestic and business difficulties.他在接受治疗,因为他在家庭生活及生意上遇到许多难题,得了抑郁症。
stem1/stɛm; stem/n [C] the long thin part of a plant that grows up out of the ground〔植物的〕茎﹔柄﹔梗see picture at见 PLANT1 图
stem2v [T] stemmed , stemming to stop something from spreading or growing 遏制…的扩散﹔阻止…的增长: stem the tide/flood/flow of sth an effort to stem the rising tide of crime 遏制犯罪率上升势头的努力stem from sthphr v to develop as a result of something 起源于﹐发源于