Grh
[医][=gas recycle hydrogenator]气体再循环氢化器
🗣️ 情景例句
Uh, it's four-thirty. Oh my!
啊 ，已经四点半了。啊 ，天啦！
What are you going to do with the books?
你打算拿这些书怎么办？
Oil rigs have to be repaired frequently and divers,who often have to work in darkness a hundred feet under water,
钻井平台需要经常修理，潜水员常常要在水面100英尺以下摸黑工作，