Ladderback
a. 椅背成梯状的
🗣️ 情景例句
and he doesn't know anything
而他毫无所知
Hear all parties.
兼听则明。
It seems that man was making a real effort to understand the seasons 20,000 years earlier than has been supposed.
看来人类早就致力于探索四季变迁了，比人们想像的要早20，000年。