- Animal experiments have long been a controversial subject.
很久以来，动物试验都是一个备受争议的题目。
- Admittedly, not all animal experimentations are cruel.
诚然，并非的动物试验都是残酷的。
- Animal experiments are carried on in the name of science.
一些动物实验是以科学的名义进行的。
- In animal experiments, teratomas containing fully formed teeth have been reported.
在动物实验中，就曾发生畸胎瘤中含有完整牙齿的案例。
