Ketosubstrate
酮基底物
🗣️ 情景例句
Don't mention it.
没事儿。
A good example is the best sermon.
身教胜似言教。
When I asked him what he was doing, he smiled guiltily and then put the parcel on the desk.
当我问他正干什么时，他内疚地笑了，然后把那个大包拿到了桌上。