佢哋唔知點算 直到嚟咗一位德國科學家 佢發現前肢同後肢喺英文裡面 係兩隻唔同嘅字 但遺傳學同德文都唔會分
They didn't know what to do until a German scientist came and discovered that forelimbs and hindlimbs are two different words in English, but genetics and German are not distinguished