How would you classify these pottery shards -- are they prehistoric?你怎么给这些陶瓷碎片 归类?它们是史前时期的 吗 ?...a prehistoric jungle occupied by reptilian creatures.爬行动物主宰的史前丛林Researchers now believe the prehistoric iceman was murdered...
一位丹麦思想家曾说过,我们的生活是向前的, 但是我们的认识却是向后的.We live forwards, a Danish thinker has said, but we understand backwards.这样补偿了当激波产生时升力向后的运动.This compensates backward movement of the lift forces as shock waves develop.运动员以向前的姿势起跳,向上、向...