不安全环境，尤其对平衡能力差和视力不好的人而言。
unsafe environments, particularly for those with poor balance and limited vision.
大多数环境是安全的，当然会有一些也不安全，尤其在晚上的时候。
Most neighborhoods are safe, although there are some that can be dangerous, especially at night.
居住环境的改变，令很多居民对身边的邻居抱着提防之心，不少人都在心里上了一把“锁”，总有种不安全感。
The change of our living environment makes people always feel on their guard against others.
但是他的工厂是一个极其不安全的工作环境。
But the factory he manned was an extremely unsafe workplace environment.
这里的工作环境并不安全。
这里的工作环境并不安全。
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