Concavation
凹度
🗣️ 情景例句
I admire him for his success in business.
我佩服他事业有成。
I'm working on it.
我正在努力。
A pilot noticed a balloon which seemed to be making for a Royal Air Force Station nearby.
一个飞行员发现了一只气球，它像是正飞往附近的一个皇家空军基地。