很困难的用法和样例：
例句
-
要用科学的字眼来表达它是很困难的。
It is difficult to express it in terms of science. -
在一个短语中，决定哪个词是主要词或重要词，有时是很困难的。
It is difficult at times to determine which is the principal or important term in a phrase. -
那个商店在一条单行道的街上，这使停车很困难。
The shop is in a one-way street, which makes it very difficult for parking.
