Umbo
n. 盾心的浮雕装饰, 壳顶, 鼓膜凸\\n[医] 突, 圆头
🗣️ 情景例句
That's beautiful!
太完美了，真棒！
The small courtesies sweeten life; the greater ennoble it.
有点礼貌使生活愉快，多点礼貌使生活高尚。
The clouds had come down so suddenly we had no warning.
乌云突然出现，我们丝毫没有觉察。