Ethylethylene
丁烯-1
🗣️ 情景例句
A house, a car and a family, what else could one want?
一所房子，一辆车子和和个家，除此之外，夫复何求？
Did you make sesame cakes yourself?
你自己亲自做烧饼？
Look at your clothes! Where have you been?
瞧你们的衣服！你们去哪儿了？