形容词
中文翻译：安全的
同义词：
['secure', 'safe', 'risk-free', 'harmless']
例句：
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1. The new safety measures have greatly improved the environment.
新的安全措施极大地改善了环境。
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2. We need to ensure the safety of our workers before starting any work.
在开始任何工作之前，我们需要确保工人的安全。
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3. The driver was not at fault and the accident was deemed safe.
司机没有过错，事故被认为是安全的。