"It is difficult for a man to understand," she says "hard, too, for any woman who has had an average hospital birth."

“对于男人来说，这很难理解，”她说，“也很难，对于那些在医院进行常规生产的任何一个女人来说。”

youdao

However, they have a difficult time making changes for many reasons: changes are hard to initiate and even harder to sustain; they take too long; and people resist them.

然而，他们很难有时间进行变革，因为：很难开始变革，也很难维持；他们花费了太长时间；但是人们还是抵抗变革。

youdao

Whether or not stretching prevents injuries is difficult to prove. If you stretch too much, or too hard, you actually can increase your risk of injury.

拉伸是否可以预防受伤是难以确认的，如果你拉伸太多，或过度，事实上会增加你受伤的风险。

youdao

It is hard to build new roads or schools, and far too difficult to fire bad teachers.

ECONOMIST: California on the couch