打破你的膝盖骨
be on your knees───跪下
at your heels───紧跟着你
beat your breast───拍你的胸脯
burn your fingers───吃苦头；自寻烦恼；引火烧身
put your feet up───休息
to kneecap───膝盖骨
at your fingertips───在附近
beat your chest───捶胸顿足
bet your boots───必然；有把握
