on a stem的意思|示意

The Clinton campaign hopes to stem the flow of super delegates to Obama with a strong showing in the Pennsylvania primary on April 22 where recent polls give her a sizeable lead.

希拉里的竞选团队将在4月22日的宾夕法尼亚初选中大力造势，希望能够阻止超级代表投向奥巴马。 最近，在宾州的民调显示她领先较大的优势。

Scientists are also trying to use a cocktail of chemicals to trick other kinds of stem cells that don't normally make heart cells to take on that role.

科学家也在尝试使用混合药剂将一般不能分化成心脏细胞的其它种类的干细胞诱导成心脏干细胞。

There's a lot of interests in obtaining stem cells from the blood of the umbilical cord on birth.

人们对从出生时的脐带血液中获取干细胞很感兴趣。

Every node (the little triangular etch) on the stem is a potential new bloom.

在茎干每个节(小三角形蚀纹)潜藏新花。

On stem cells, he says he changed his mind in 2004, after a scientist told him there was no moral issue involved because the embryos used in the research would be destroyed anyway.

对于干细胞研究的态度，他说在2004年，某位科学家告诉他这项研究不涉及到道德问题，因为用于研究的晶胚无论如何都将被销毁之后，他的看法有了改变。

And while many employers don't insist on a particular degree subject, a third prefer to hire those with a STEM-related subject.

尽管许多雇主并不坚持要某个特定的学位，但三分之一的雇主更愿意聘用那些学过 STEM 相关课程的人。