Earthscience
地球科学
🗣️ 情景例句
I have the whole summer ...
我有一整个暑假可以利用……
Appetite comes with eating.
食欲越吃越旺。
Economy is one powerful motive for camping, since after the initial outlay upon equipment,
图省钱是露营的一个主要动机，因为除了开始时购置或是租借一套露营装备外，