The influence of leaf Numbers attached on an alfalfa stem on the drying rate was analyzed and compared with that of a single leaf and a single stem.

分析了苜蓿茎上附着的叶片数对其干燥速率的影响，并与单叶和单茎的干燥速率进行了对比。

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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。

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By contrast, the large zebra lives on the masses of low-quality stem material.

相比之下，大型斑马依靠大量的低质量茎材料为生。

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Scientists say the auxin has an indirect effect on buds on the side of the stem to prevent branching.

VOA: special.2009.10.13

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

从出生时的脐带血中取得一些干细胞,也很有趣

耶鲁公开课 - 生物医学工程探索课程节选

stem cell research can go on without the ethical dilemma provided by killing embryos.

干细胞研究者可以免受由于杀死胚胎而带来的道德困境。

干细胞和伦理 - SpeakingMax英语口语达人

They're going to try, for example, to turn to a debate on stem cells on Monday and Tuesday.

NPR: Mideast Conflict Has Ripple Effect in Washington

The Royal Society will host a meeting in London on stem cell research on Thursday and Friday.

CNN: Call for ban on human cloning

They built a business called Exploration Nation around Enzo and his friends learning and teaching STEM curriculum on-line.

FORBES: Here's An Idea: Make STEM Education Fun