Protolithic
a. 原始石器时代的
🗣️ 情景例句
His actions express his love more than any words could do.
他用行动表示的爱胜过任何言语。
Guess how old I am.
猜测我有多大。
Recently the New York Animal Medical Center made a study of 132 cats over a period of five months.
最近，纽约动物医疗中心对132只猫进行了为期5个月的综合研究。