:difficult的意思什么？difficult的反义词近义词是什么？

　　3. It would be difficult to find two men who were more dissimilar.

　　很难找到彼此间差异更大的人了。

　　4. There's no petrol, so it's very difficult to transport goods.

　　没有汽油，因此很难运输货物。

　　5. Adults need to live their own lives and that's difficult with children.

　　大人需要过他们自己的生活，但有了孩子就很难做到了。

　　6. It is difficult to praise this immaculately researched work too highly.

　　这项研究工作毫无瑕疵，怎样称赞都不过分。

　　7. They find it difficult to pump themselves up for the games.

　　他们感到要为自己加油打气，自信满满地去打比赛并不容易。