Catalyst activity
[化] 催化剂活性
🧩 词语组成解析
🗣️ 情景例句
There's nobody here!
这里一个人都没有
I don't know whether it will rain or not.
我不知道是否将下雨。
At that moment, a large black car with four officers inside it, stopped at the camp gates.
正在此时，一辆黑色大轿车在军营门口停了下来。里面坐了4个军官。