Ultracracking
超加氢裂化
🗣️ 情景例句
I'm thinking about it....
我正在考虑中……
When is the most convenient time for us to meet?
我们什么时候见面最方便呢？
Oh, and please keep together. We don't want any of you to get lost!
噢，请大家靠拢一些。我们不想丢下任何一位同学！