Alveolization
岩石表面凹窝
🗣️ 情景例句
He was killed on the spot.
他当场被杀。
Every man has his hobby-horse.
人各有所好。
In man's early days, competition with other creatures must have been critical.
在人类早期，人类与其他生物的竞争一定是必不可少的。