Annularity
n. 环状, 轮状
🗣️ 情景例句
When's the last time you took a vacation?
上次你去度假是什么时候？
No garden without its weeds.
有利必有弊。
It is all too easy to blame the railway authorities when something does go wrong.
因此，一旦铁路上真出了问题，人们便不加思索地责备铁路当局。