stem

词干英释nnthe part of a word that stays the same when different endings are added to it, for example ‘driv-’ in ‘driving’

1 stem cell,干细胞，骨髓干细胞

2 stem from,起源于

3 brain stem,脑干

4 drill stem,钻柱；钻杆；钻具

5 main stem,[美俚]干线；主街

6 valve stem,【机】阀杆

7 from stem to stern,完全；从头到尾

8 stem rust,杆锈；茎锈病

9 hemopoietic stem cell,造血干细胞

10 stem borer,蛀茎虫；天牛；蔗螟；茶天牛

11 rising stem,升杆

12 stem seal,阀杆密封；芯轴密封

1 真题例句...that lack of enthusiasm could stem from concerns about privacy and security...第二套CET62016.12阅读理解

2 真题例句...Native farmers were hostile towards the wheat program because of serious crop losses from 1939 to 1941 due to stem rust...第三套CET62013.6阅读理解

3 真题例句...the UK National Stem Cell Network warned the UK could lose its place among the world leaders in stem cell research unless adequate funding and legislation could be assured...CET62011.12阅读理解

1 ‘Writ ’ is the stem of the forms ‘writes ’, ‘writing ’ and ‘written ’..writ是writes、writing和written三个词的词干。