nub
n[sing]
the ~ of sth central or essential point of a problem, matter, etc (问题、 事情等的)中心,要点
The nub of the problem is our poor export performance. 问题的关键是我们出口贸易方面太差.
🗣️ 情景例句
Nice to meet you, Mrs. Cooper.
很高兴见到你, Cooper太太。
Stop blabbering!
别唠唠叨叨了!
This echo-location in bats is often compared with radar, the principle of which is similar.