Zeolite(molecular sieve)catalyst
[化] 沸石催化剂; 沸石分子筛催化剂
🗣️ 情景例句
Excuse me? What did you say?
对不起，你说什么？
The tour will take about an hour and a half. We ought to be back here by 3:00.
参观大概要一个半小时，3点钟以前回到这里。
The last creature to compete with man was the mosquito.
能与人竞争的生物最后只有蚊子了，