Teacherless
[计] 无教师的
🗣️ 情景例句
He is fun to be with.
与他相处很有趣。
I'm feeling rather blue.
我觉得有些沮丧。
and a period (which is the time it takes a wave crest to travel one wave length).
和周期（浪峰走过一个波长所需的时间）。