Umbc
[医][=umbilical cord]脐带
🗣️ 情景例句
Take care, and have a nice flight.
请保重！祝你一路顺风！
So soon? Why don't you stay a little longer?
这么早就走了？为什么不呆一会呢？
If the feeding place was away from the sun, the straight part of the wagging dance pointed downward.
如果喂食地点向着太阳，跳舞的蜜蜂在跳摇摆舞时直线部分就一直向上。