慢速英语:Immigrants Keep U.S. Birth Rates from Dropping(翻译)

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1. immigrant n. 移民，侨民
例句：His advocacy of the right of illegal immigrant to remain in the country.
他对非法移民留在此国家的权利的支持。

2. assistance n.帮助，援助
例句：When I was in difficulty he kindly came to my assistance.
我遇到困难时,他好心地来帮助我。

3. retirement n.退休，退职
例句：They show great anxiety concerning their retirement allowance.
他们对自己的养老金问题显得十分焦虑。

4. provide vt. 提供，供给，供应
例句：I'll be glad to provide a copy of this
我很愿意提供它的一个副本。