put sand in the machine

sand... ... plough the sand v. 白费力 put sand in the wheels v. 妨碍,捣乱 a rope of sand n. 不牢固的结合,无结果的事 ...

... knock the sand from under sb. 作徒劳无功的事 put sand in the wheels 捣乱, 暗中破坏 raise sand 用沙填塞(油井等) ...

英语新词汇与常用词汇的翻译(P) ... put round 传播 put sand in the wheels 妨碍 put sb on to 接电话 ...