Clearly, Alvin had a difficult problem to solve, but rather than being able to sense any forward progress, he was beaten down and made to feel incompetent.

很显然，Alvin面临着一个难题，但是在还没有体会到任何进步之前，他就已经被困难打倒而且我们可以感到他的无助和自卑。

youdao

Rather, he offered his engineers a difficult and interesting problem to solve, confident that someone would want to accept the challenge.

相反，他向他的工程师们提出了一个艰巨但颇为有趣的难题，并且坚信总会有人乐于接受这个挑战。

youdao

It is a rather difficult problem.

这是相当难的一个问题。

youdao