我能明白为什么宇航员们发现难以重新适应地球上的生活。

I can understand why astronauts find it difficult to readjust to life on earth.

《柯林斯英汉双解大词典》

那是个难以弄明白的概念，但我很快就理解了。

It was a difficult concept to grasp, but I soon latched on.

《牛津词典》

结果难以让人明白，也是不足为怪的，因为那时的意图本身就不清楚。

That the result was not clear is not to be wondered at, for neither was the attempt then clear unto itself.

youdao