安

例句：

1. 1. We need to ensure our safety during the construction.
   我们需要确保施工期间的安全。
2. 2. Her peace of mind is restored after a long day's work.
   经过长时间的工作后，她的心终于平静下来。
3. 3. The company promised to provide safe working conditions for its employees.
   公司承诺为员工提供安全的工作环境。