push one's luck 得寸进尺，贪心，冒越来越大的风险

　　It's already very good, don’t push your luck!

　　已经很不错了，别太贪心了！

　　You better stop, you are pushing your luck.

　　最好赶快停止，你这是在得寸进尺啊！

　　疯狂练习吧！