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A:By the way, how many books am I allowed to check out?
顺便问一下,我一次可以借出几本书?
B:You can check out two books at a time.
一次两本。
A:How long can I keep the books?
我可以借多长时间?
B:For two weeks. After that you must renew the books if you wish to keep them longer.
两周,如果你想要借更长时间的话,你得续借。