sink or swim
有所成就或遭遇失败，没有中间地带或妥协的选择
口语·描述自生自灭的处境
英文释义
to either succeed or fail completely, without any assistance or support
例句
They threw me into the new job with no training—it was sink or swim.
典故来源
源自游泳比喻，要么沉下去要么游上来，指在无帮助下成败全靠自己。