Petroleum refining catalyst
[化] 石油炼制催化剂
🧩 词语组成解析
[计] 精炼, 提纯\\n[化] 精炼; 精制; 提炼; 匀料; 匀浆
🗣️ 情景例句
Oh, so you don't need something immediately?
呵， 所以你们 ，不是急着马上就要？
Nothing is given so freely as advice.
劝人最容易。
He has an old head on young shoulders.
他年轻又有见识。