Though it prefers hunting small mammals, the Arctic fox is at heart an opportunist. The Arctic is no place to be picky.
虽然喜欢捕食小型哺乳动物，但北极狐本质上是一个机会主义者。北极不是一个可以挑肥拣瘦的地方。As long as America depends on foreign capital, it needs to be less picky .
只要美国还依赖外国资本，它就不能如此“挑肥拣瘦”。Usually I hate pancakes but beggars can't be choosers. So I walked in hoping to find some discarded pancakes since I had no money.
通常我不喜欢吃烙饼，但是叫花子不能挑肥拣瘦，所以我还是走了进去，希望能找到一些别人吃剩的烙饼，因为我身无分文。Do not be picky in the social intercourse. Try to make friends with all kinds of people.
交际不要挑肥拣瘦，应该和各种各样的人打成一片。When seeing others be picky about choosing a lover, we may laugh ironically at their ignorance of their own looks.
看别人谈恋爱挑肥拣瘦，我们暗说，不知自己长啥样，还在那儿挑挑拣拣。He is always very picky about food.
他吃东西总是挑肥拣瘦。My mother is one of pickiest shoppers I know.
我母亲是我所知道的最爱挑肥拣瘦的顾客之一。I don't care much for the Christmas present, for beggars can't be choosers.
对于什么样的圣诞礼物我不在乎，因为叫花子不能挑肥拣瘦。"Beggars can't be choosers" -- means that if you are asking someone to give you something, you don't get to choose what they give you.
“要饭的哪能挑肥拣瘦”——指的就是如果你要别人给你啥东西，你就没有挑剔的份。