Umbos
n. 盾中心的浮雕；壳嘴；鼓膜凸 (umbo的变形)
🗣️ 情景例句
What sort of experience do you have?
你有什么样的经历？
Fifty-litre carboy would be the most economical size. Carboys may be retained without charge for two months.
50升的瓶子应是最经济的尺码，这些瓶子可免费保存两个月。
At that moment Lucy came into the library.
正在那时候，露茜走进图书馆。