Hints: 本期學習的字源：post-=after后 postmortem 單詞不需要大寫，單詞與例句或不同詞條之間換行即可。 注解中詳細介紹了單詞的拆分與釋義，是學習字源分析的重中之重！一定記得聽寫后來看注解！
postpone posterity We must protect the environment for posterity. postmortem The coroner conducted a postmortem to decide the cause of death. preposterous No one believes his story because it's simply preposterous.
We must protect the environment for posterity. 我們得為后代保護好我們的環(huán)境。 The coroner conducted a postmortem to decide the cause of death. 法醫(yī)進行驗尸以判定死因。 No one believes his story because it's simply preposterous. 他的故事太荒謬了，根本沒有人相信。