Sorry, Sir, I must answer the call of nature-i won't be long.
对不起先生，我得去方便一下，就一会儿。
Will China answer the call of Africa and offer disaster relief assistance?
中方是否会回应非方诉求，向非洲提供救灾援助？
He had to leave suddenly to answer the call of nature.
他不得不突然离开去解决下内急。
He had to leave suddenly to answer the call of nature.
他不得不忽然离开去处理下内急。
He had to leave suddenly to answer the call of nature.
他不得不忽然离开去处理下内急。
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