Ketoisovalerate
酮异戊酸
🗣️ 情景例句
Thank you.
谢谢。
Saying is one thing, and doing another.
说是一回事，做是另一回事。
Well, I've dug this hole. Hold this stick, while I knock it in.
嗯，我已挖好了坑。当我插木混时，你帮扶着。