Transanhydrisation
酐交换作用
🗣️ 情景例句
Well ...
好……
Please call me if you have any problems.
如果你有难题，就请打电话给我吧。
'The strap needs mending,' said Mrs.Sterling later, 'but they did not steal anything.'
“这提包带需要修理，”斯特林夫人事后说道，“不过他们什么也没偷走。”