Zeolite(molecular sieve)catalyst
[化] 沸石催化剂; 沸石分子筛催化剂
🗣️ 情景例句
without studying these building plans more carefully.
在没有仔细研究这些建筑图的情况下。
Nothing for nothing and very little for a half penny.
一分钱，一分货。
This machine joins the metal pieces together, he said.
“这台机器把金属片焊接起来，”他说