Ketoaldehyde
酮醛
??? 情景例句
I can get some of my friends to go around the neighborhood
我可以叫我的朋友們?cè)谶@社區(qū)
Tell us about your post-purchase servicing.
告訴我們有關(guān)你們售后服務(wù)的情況。
Yes, it certainly is.
是呀，確實(shí)如此。