Umbos
n. 盾中心的浮雕；壳嘴；鼓膜凸 (umbo的变形)
🗣️ 情景例句
He studied harder to improve his English.
他更加努力提高英语水平。
They assume most who know the least.
懂得最少的人自以为最了不起。
The coffee is very weak; I like it a bit stronger.
咖啡太淡了，我要浓一点的。