Acet
[化] 次乙基; 乙酰
🗣️ 情景例句
Sure, but never before have we had payment in RMB.
当然可以，不过我们从来没有用过人民币付款。
You're way behind schedule.
你比预定的落后了。
It has to be tall because it is like a giant block and tackle,
井架必须很高，因为它像一个巨型滑轮组。