A dirty environment will attract many cockroaches and it does harm to our health.
你见过蟑螂吗？很多人都不喜欢蟑螂，甚至是害怕它们。
If they don't do this dirty job, we will live in a horrible environment.
如果他们不做这些脏脏的工作，我们的生活环境将会变得很可怕。
I don't understand how you can live in such a dirty and messy environment.
我真不知道你如何在这么脏乱的环境里生活的。
The dirty cleaner make the working condition cleaner and more environment protection.
具有排污收集装置，使机组个工作环境更清洁、环保。
The dirty cleaner make the working condition cleaner and more environment protection.
具有排污收集装置，使机组个工作环境更清洁、环保。
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