Trifluoroacetic
三氟醋酸的
🗣️ 情景例句
At this time tomorrow morning,Grandpa will be sitting in the kitchen with us.
明早这时候爷爷就和我们一起坐在厨房啦。
You and your big mouth!
你这张快嘴！
Excuse me.Where's the nearest post office, please?
请问。最近的邮局在哪里？