Deadpanning
(deadpan 的现在分词) n. 无表情的脸
🗣️ 情景例句
I had a busy day. I'm done.
我今天很忙，现在精疲力尽。
I couldn't get through.
我打不通。
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。