Concaving
v. 凹的( concave的现在分词 ); 凹地; 凹面, 成凹形
🗣️ 情景例句
By arranging with the public schools
首先， 从公立学校开始
For professional footballers, injuries are an occupational hazard.
对于职业足球运动员来说，受伤是职业本身带来的危险。
He paused for a reply.
他停下来等着回答。