pumped medium

例句：

1. 1. The pumped medium is used to increase the efficiency of the oil extraction process.
   这种增压介质被用来提高石油开采过程的效率。
2. 2. In this experiment, we used a pumped medium to simulate the movement of water in a river.
   在这个实验中，我们使用一种增压介质来模拟河水在河流中的流动。
3. 3.The pumped medium was used to create a low-pressure environment for testing the new technology.
   这种增压介质被用来创造一个低压环境来测试新技术。