New Words:

library [ˈlaɪbrəri] 图书馆
playground [ˈpleɪɡraʊnd] 游乐场;操场

I went to the library and took your books back.
我去了图书馆，帮你把书还了。

You can play it in the playground.
你可以在操场上玩。

It is time for them to play football on the playground.
是他们到操场上踢足球的时候了。

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