名词
中文翻译：Unknown
同义词：
['secret', 'conceal', 'hide例句：1. Sambo was a secret agent who worked for the government.（Sambo是一名政府的秘密特工。）']
例句：
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1. Sambo was a secret agent who worked for the government.
Sambo是一名政府的秘密特工。
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2. The old man kept his secrets to himself and never revealed them.
老人保守着自己的秘密，从不透露。
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3.They hid their treasure in a secret cave.
他们把宝藏藏在一个秘密的山洞里。