Acetylization
乙酰化作用
🗣️ 情景例句
Part of the building for older people,
建筑物中的一部分给老年人用，
There's many a good tune played on an old fiddle.
老当益壮。
Waiter. Will the pancakes be long?
服务员，煎饼要很久才做好吗？