Diastereoisomeride
非對映異構(gòu)體
??? 情景例句
He won't come until next week.
他下星期才會來。
Please send us all the data concerning your Hero Brand fountain pens and ball pens, so we can introduce your products to our customers.
請寄給我們有關(guān)你方英雄牌自來水筆和圓球筆的資料，以便我們向顧客介紹你們的產(chǎn)品。
We ate our sandwiches and a bar of chocolate each and began to feel better.
我們倆都吃了三明治和一塊巧克力才感到舒服些了。