Ethylenes
乙烯属烃
🗣️ 情景例句
I worked to put together a book of photographs.
我的工作是创作出一本摄影书。
Purpose supposes foresight.
深谋远虑。
Often a valley boasted no inn at all, and climbers found shelter wherever they could --
山谷里常常没有小客栈，登山者只好随遇而安。