羊咩咩要攒钱
in prehistoric times——在史前时期historic times有史时期(与史前时期相对)"Jewelry evolved from shells, animal teeth, and other objects used as adornment in prehistoric times."史前时期原始人取动物的牙、壳和其它物体等装饰自己。Drawing is a particular type of visual art, stemming back to prehistoric times with their rock and cave drawings.绘图是一种特殊的视觉艺术类型，可追溯至史前时期的岩画或洞穴壁画。
