Unflatness
不平直度
🗣️ 情景例句
Lacks courtesy is ill-mannered.
不礼貌，举止不当。
How do I call this number?
这个号码怎么打？
Suddenly, a middle-age lady got on the train and sat opposite Sally.
突然，一个中年妇女上了火车，坐在萨莉的对面。