类似的短语还有：the key to the door门钥匙；the answer to the question问题的答案the words to atune一致的言语the entrance to the park通向公园的入口
1.This medicine may be an answer to our prayers.
这种药也许是对我们的祈求的.回答。
2.Do you know the words to this song?
你知道这首歌的歌词吗？
3.The key to success is preparation.
成功的关键是准备。
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