Phthalanone
邻羟甲基苯甲酸内酯
🗣️ 情景例句
I have to sign copies of my book for a lot of people
我还必须为许多人在我的书上签名
To facilitate carrying, rope or metal handles are indispensable and should be fixed to the boxes.
为便于搬运，绳子或铁把手不可缺少，并将其固定在箱子上。
Yes, thanks. How's Kate?
很好，谢谢。凯特好吗？