Concavities
n. 凹面, 成凹形( concavity的名词复数 )
🗣️ 情景例句
Oh, Susan, thank you so much
噢 ，Susan ，谢谢你。
Sure. Here it is.
当然有。这就是。
but they do underline the general principle that the relationship between elephant and mahout is the key to successful training.
但强调了一项基本原则，象和驯象员之间的关系是驯象成功与否的关键。