台湾籍旅美老师今天交给我们的句子是：

Through scientific surgery, researchers have shown that at the embryonic stage of development, frogs can regenerate their developing limbs. This has even been shown in mice, which like humans, are mammals. It is yet to be proven the same with human embryos, but with this evidence, the theory is that vertebrate embryos, including humans, can regenerate their limbs if they are damaged or amputated.
经由科学的手术，研究人员已证明了，青蛙在胚胎发展阶段时，其发育中的四肢是可以重新再长出来的。老鼠也被证实是可以办到的，而老鼠跟人类一样都是哺乳动物。虽然人类胚胎还尚未被证实同样能做得到，但从以上证据看来，理论上脊椎动物的胚胎(包含人类在内)，肢体如果受伤或被截除，都还可以再长。

学习重点：

1.surgery 手术
surgery (n.) 手术
surgical (adj.) 外科的

2.embryonic 胎儿的
embryonic (adj.) 胎儿的
embryo (n.) 胚胎

3.regenerate 再生
regenerate (v.) 再生
generate (v.) 产生、引起

4.evidence 证据
evidence (n.) 证据
evident (adj.) 明显的

5.amputate 截肢
amputate (v.) 截肢
amputation (n.) 截肢
prosthesis (n.) 义肢