I think athletes sinkorswim depending on how they motivate themselves.
我认为运动员的成败取决于他们如何激励自己。
《柯林斯英汉双解大词典》
2
The new students were just left to sinkorswim.
学校完全让新生自生自灭。
《牛津词典》
3
If you've suddenly been dumped, you'll have had a picture in your mind of how your life was going to be and, when it all comes crashing down, you either sinkorswim.