Hints: 本期学习的字源：poly-=many多 Mormons polyglot的例句有分号; 单词不需要大写，单词与例句或不同词条之间换行即可。 注解中详细介绍了单词的拆分与释义，是学习字源分析的重中之重！一定记得听写后来看注解！
polysyllabic polygamy The American Mormons used to practice polygamy. polyglot He speaks five foreign languages fluently; he's a true polyglot. polygraph The suspect has agreed to do a polygraph test to prove that he is innocent.
The American Mormons used to practice polygamy. 美国摩门教徒从前实行一夫多妻制。 He speaks five foreign languages fluently; he's a true polyglot. 他能流利地说5种外语，真是通晓多语言的专才。 The suspect has agreed to do a polygraph test to prove that he is innocent. 嫌犯同意测谎以示清白。