Catalyst selectivity
[化] 催化剂选择性
🧩 词语组成解析
n. 选择性, 选择度\\n[化] 选择性
🗣️ 情景例句
You are in great shape, Richard.
你的身体状况好极了， Richard。
When did you travel?
你什么时候旅行？
An even harder situation is to be on the platform in good time for a train and still to see it go off without you.
更难堪的情况是虽然及时赶到站台上，却眼睁睁地看着那趟火车启动，把你抛下。