open-off cut

例句：

1. 1. The engineer made an open-off cut to fit the new pipe perfectly.
   工程师做了一个切口来完美地安装新的管道。
2. 2.The carpenter made a cut in the wood to make it stronger.
   木匠在木头上做了个切口使其更坚固。
3. 3. The scientist made an open-off cut in the sample to study its properties.
   科学家在样本上做了切口以便研究其性质。