摘要：The choice between "a" and "an" is always based on the sound that comes next, not on the category of the letter. We say and write "a university" becau 阅读全文

摘要：https://forum.wordreference.com/threads/the-same-with-and-the-same-as.1323516/ 阅读全文

摘要：出处 https://www.linkedin.com/pulse/20140903131536-29650941-20-phrases-for-closing-an-email By Matt Schmid A common problem We often hear how writing em 阅读全文