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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.
藉由精確的手術，研究人員已經發現到，在胚胎發展階段蝌蚪正在發展的肢體可以再生。這也已經在老鼠，跟人類一樣都是哺乳動物，胚胎上發現此現象。雖這還尚未在人類胚胎上被證實，但從以上證據，理論上脊椎動物的胚胎，包含人類，在肢體受到傷害或是截掉後都可以再生。
句子選自此影片：
為什麼四肢斷了卻再也長不回來？ (Why Can
學習重點
5. amputate 截肢
amputate
[ˋæmpjə͵tet] (v.) 截肢
amputation
[͵æmpjəˋteʃən] (n.) 截肢
prosthesis
[ˋprɑsθɪsɪs] (n.) 義肢
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