it is difficult to do释义：

难以（做）...

很难（做）...

例句：

Everything else that we accomplished stems from achieving that partnership, because if you don't have a customer who perceives you as valuable, then it is difficult to do the things you want to do.

所有其它我们获得的成功都来自于那种伙伴关系的实现，因为如果一旦你没有认为你很有价值的客户，那么你就很难做到你想做的事情。

it difficul to do释义：

这很难做到

例句：

I find/feel/think it difficult to do…

我发现/感到/认为做某事很难。