butter both sides of one's bread
左右逢源
A:May doesn't get along very well with her mother-in-law.
A：玫和她婆婆相处得不好。
B:Yeah. That's just what is troubling John.
B：是呀，那正是约翰心烦的事。
A:Poor John! He is buttering both sides of his bread.
A:可怜的约翰!他要两头做人。
B:This situation isn't easy to handle.
B:这可真不好办。