Many people object to experimentation on embryos.

许多人反对用胚胎做实验。

《牛津词典》

There are 24,000 frozen embryos in clinics across the country.

全国各地的诊所里有24000个冷冻胚胎。

《柯林斯英汉双解大词典》

Early embryos of many species develop ancestral features.

许多物种的早期胚胎具有其祖先的特性。

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Scientists also studied eggs from the frogs to learn about the development of fertilized eggs into embryos.

VOA: special.2010.06.29

Easiest to find them in embryos but sometimes they can be found in adult organisms as well.

它们在胚胎中最容易被找到,但有时在成人的机体中也能找到

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 then began to divide into embryos, but none grew past the six-cell stage.

FORBES: Cloning's High Cost

In standard IVF, embryos are removed from the incubator once a day to be checked under the microscope.

BBC: IVF 'may be boosted by time-lapse embryo imaging'

In the initial attempt, a doctor implanted several embryos in two separate surrogate mothers.

WSJ: Hiring A Surrogate In India