形容词
中文翻译：安全的
同义词：
['safe', 'dependable', 'reliable']
例句：
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1.The new security system has greatly improved our safety.
新的安全系统大大提高了我们的安全。
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2.The car is very secure; no one can break into it.
这辆车非常安全，没人能偷走它。
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3. He was so secure in his job that he didn't worry about losing it.
他在工作上如此自信，以至于他不用担心失去它。