There is no conceivable reason why there should be any difficulty.

想不出有什么理由明会遇到困难。

Those young men are too easily disheartened by difficulties.

那些年青人遇到困难时太容易泄气了。

I’ll help you with your mathematics if you’re stuck.

你要是在数方面遇到困难, 我会来帮助你的。