put sand in the machine raise sand

• 妨碍； 阻挠; 破坏

put sand in the machine raise sand的用法和样例：

例句

1. Her social life got in the way of her studies.
   她的社交生活妨碍了学业。
2. The heavy rain retarded our progress.
   大雨妨碍了我们的进展。