Deadpanning
(deadpan 的現在分詞) n. 無表情的臉
??? 情景例句
I had a busy day. I'm done.
我今天很忙，現在精疲力盡。
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.
一旦氧氣在空氣中的含量達到25%，它就要燃燒。