确保你们选择一些各种各样的不同的书，以便每一次都可以学到一些新的词汇。
Make sure you choose a variety of different books so that you have to learn some new vocabulary each time.
这一基调在他的序言里就有所显现，在长达4页的序言中“我”，“我的”这些词汇就出现了34次。
The tone is set in the four-page prologue which contains 34 instances of the words “I”, “me” or “my”.
他为了选择合适的词汇而稍作停顿，坐在他身边的米歇尔提示，“一次什么？”
He paused so long in choosing his words that Michelle Obama, sitting alongside him, prompted him. “Has what?”
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