Convexoconcave
[医] 凸凹的
🗣️ 情景例句
Nothing interesting.
没有什么有趣的。
When all men speak no man hears.
人人都讲话，无人去听它。
They had just had enough time to swim out of danger when the boat again completed a circle.
他们刚刚来得及游出危险区，快艇就又转完了一圈。