If you have a difficult family member or relative, it is quite hard to remove them from your life completely.
如果你的家人或亲属中有这样难以相处的人，就不太可能完全摆脱。
One's reputation, like a piece of white cloth, is easy to stain while it is hard to remove the stains from it.
一个人的名声就像一块白布，很容易被玷污，但要清除这些污点却很难。
There appears an emulsified layer which is hard to remove between the oil-water interface in the sedimentation tank located at Longyilian united station.
大庆油田第九采油厂龙一联污水处理场沉降罐上部油水界面处出现一层难以去除的乳化漂浮物。
Cigarette smoke contains many types of carcinogenic particles which can become trapped in air-conditioners. It is also hard to remove the smell from cars even with all the windows opened.
“烟气中含有多种致癌颗粒，这些微粒会吸附在空调上。即使把车窗全部打开，也很难去除车内的烟味”。
Cigarette smoke contains many types of carcinogenic particles which can become trapped in air-conditioners. It is also hard to remove the smell from cars even with all the windows opened.
“烟气中含有多种致癌颗粒，这些微粒会吸附在空调上。即使把车窗全部打开，也很难去除车内的烟味”。
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