Alkylene
亚烃基, 烯化, 烷撑
🗣️ 情景例句
That's OK. Everybody else does, too. See you tomorrow.
没关系。大家都是这样。明天见。
He snatched the purse and the ladder, and ran away.
他抢了手提袋和梯子，逃走了。
and is still non-existent in a number of 'civilized' nations.
今天，在许多文明国家里，义务教育迄今尚未实行。