He is easy to prevail upon .

他是容易说服的。

He is easy to prevail upon [with].

他是容易说服的。

Paragraph9: The Dictionary, together with his other writing, made Johnson famous and so well esteemed that his friends were able to prevail upon King George III to offer him a pension.

这本词典以及他的其他著作使约翰逊变得非常有名和受人敬重，它的朋友们最终说服了乔治三世国王为他提供一份退休金。

You're going to prevail upon this miserable family to find you a new situation.

你试图离开这饱经罹难的家庭，寻找一个新的环境。