vacuum well

例句：

1. 1. The vacuum well was used to extract oil from the earth.
   真空井用于从地下提取石油。
2. 2. The vacuum well was a crucial component of the mining operation.
   真空井是采矿操作中至关重要的部件。
3. 3. The vacuum well was sealed off, preventing any further contamination.
   真空井被密封，防止进一步污染。