Thru is a short spelling of through. It sounds exactly the same and means exactly the same; only the letters are different. It is American, and it belongs to signs, forms and quick notes rather than to real writing: 'open Mon thru Fri', 'drive-thru', 'thru traffic'.

thruthru is a short spelling of through是through的簡寫拼法 it sounds exactly the same and means exactly the same聽起來、意思都一模一樣 only the letters are different只是字母不一樣 it is American它是美式用法 and it belongs to signs, forms and quick notes而且是屬於標示、表格和隨手筆記 rather than to real writing而不是正式寫作 'open Mon thru Fri''open Mon thru Fri', 'drive-thru''drive-thru', 'thru traffic''thru traffic'

Two places you will really meet it. First, 'drive-thru' — the window at a fast-food restaurant where you order from your car; that spelling is now the normal one, even on the company's own signs. Second, American dates and ranges, where 'Monday thru Friday' means Monday to Friday and includes both ends.

two places you will really meet it你真的會遇到它的有兩個地方 first第一 'drive-thru''drive-thru' the window at a fast-food restaurant where you order from your car就是速食店讓你坐在車上點餐的窗口 that spelling is now the normal one這個拼法現在已經是標準寫法 even on the company's own signs連公司自己的招牌也這樣寫 second第二 American dates and ranges美式的日期和區間 where 'Monday thru Friday' means Monday to Friday and includes both ends'Monday thru Friday'就是指星期一到星期五，兩端都包含在內

Everywhere else, write through. If you use thru in an essay or a work email, an examiner or a British reader will very likely count it as a mistake.

everywhere else在其他所有地方 write through要寫through if you use thru in an essay or a work email如果你在作文或工作email裡用thru an examiner or a British reader考官或英國讀者 will very likely count it as a mistake很可能會把它算成錯誤

Interestingly, this is not a new lazy invention — 'thru' was one of several spellings floating around in Middle English, centuries ago; the modern American use grew up around 1839 as a simpler, more phonetic way to write the word.

interestingly有趣的是 this is not a new lazy invention這不是新發明出來的偷懶寫法 'thru' was one of several spellings floating around in Middle English, centuries ago幾百年前的中古英文裡，'thru'就是當時流通的好幾種拼法之一 the modern American use grew up around 1839現代美式用法是在1839年前後發展出來的 as a simpler, more phonetic way to write the word當作一種更簡單、更照發音寫的拼法