Concaveness
n. 凹面, 成凹形
✅ 同义词
🗣️ 情景例句
I'm so glad everyone is asleep.
很高兴大家都睡了。
Packing will help push the sales.
包装有助于推销产品。
Spiders are not insects, as many people think, nor even nearly related to them.
许多人认为蜘蛛是昆虫，但它们不是昆虫，甚至与昆虫毫无关系。