Pon
abbr. [计]无源光网络（Passive Optical Network）；[医]副氧化脢；[石]粒状有机氮
🗣️ 情景例句
It's our school, but we can't vote.
那是我们的学校 ，可是我们却不能投票。
This airline has a good safety record.
这家航空公司有很好的飞行安全记录。
I find listening really hard. Sometimes it's just impossible to understand.
我觉得听力很难。有时简直听不懂。