难做的事

difficult task───艰巨的任务

difficult time───困难时期

difficult birth───难产

difficult issue───难题

difficult match───困难的比赛

difficult period───困难时期

difficult season───困难季节

difficulty───n.困难，困境

difficult position───困境

Without health, it will increase the difficulty to do anything.───没有健康的身体，做任何事情的难度都会随之而增加。

After they've learned how to do a simple task, start increasing the difficulty incrementally.───当他们学会完成一个简单的任务之后，可以开始逐渐增加难度。

Despite some excitable recent talk of sharing a carrier with France, the difficulty of agreeing what to do with such a Shared vessel make that idea unworkable.───尽管最近出现了一些与法国分享一首航空母舰的疯狂言论，但就如何使用这样一个共同使用的航母的困难使的这一想法根本行不通。