Apprehensions
疑惧
🗣️ 情景例句
I'm sorry, I don't really understand.
对不起，我真的听不懂。
I've arranged my class schedule so I'll have my afternoons free.
我调整了我的课程表，以便下午腾出空来。
Once the oxygen content of the air had risen to 25% it was ready to burn.
一旦氧气在空气中的含量达到25%，它就要燃烧。