同根派生 foot hold相关词英汉例句At the precise moment that I put my foot on the step, the bus started.恰恰就在我登上公共汽车踏板的时候，车子开动了。We also can change the pitch of each timpani by pressing our foot on a pedal.我们同时可藉由用脚踩踏板来改变音调。foot hold更多例句