善于应付用英语可以翻译为"good at handling"或"adept at dealing with"。这个短语来源于拉丁文"adeptus"，意思是"有能力的"或"熟练的"。

例句：

John is good at handling difficult customers. (约翰很善于应付难处理的客户。)

She is adept at dealing with emergencies. (她善于应对紧急情况。)

He is an adept negotiator. (他是一个善于谈判的人。)