Methylacetal
醋酮
🗣️ 情景例句
There's a shortcut--if you know it.
假如你识路的话, 有一条近路可走。
Without a friend the world is a wilderness.
没有朋友，世界就等于一片荒野。
You've got lots of old buildings in your country.
你们国家有许多古老的建筑物。