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　　Welcome to Daily Tips on Learning English. Today’s tip is on the pronunciation of the letter “t”.

　　Of course the letter “t” is usually pounced “t”. But you may have noticed that in fluent speech, native speakers sometimes pronounced the “t” as “d”. That happens when the “t” comes between two voiced sounds（濁音）.

　　一般情況下，“t”發(fā)“t”的音。但你也許能注意得到，外國人在說的很快時，會將't'發(fā)成'd'的音。一般't'的兩邊都是發(fā)濁音的情況下，會濁化為'd'。

　　Do you know what sounds in English are voiced? Well, there’re 15 voiced consonant sounds(濁輔音)in English. /b/, /d/,/g/,/m/, /n/, /ng//v/,/z/, /δ/,/l/, /r/, /d?/,/?/,/y/, /w/.

　　你知道什么音是濁音嗎？英語中濁輔音有/b/, /d/,/g/,/m/, /n/, /ng//v/,/z/, /δ/,/l/, /r/, /d?/,/?/,/y/, /w/.

　　Also, all vowel and diphthong sounds in English are voiced. So let’s look at some examples of words in which the “t” may be pronounced “d”.

　　元音、雙元音都是濁音，我們來看看一些例子。

　　No.1 “matter”. “matter” is often pronounced “mader” as in “What’s the matter?”

　　No.2 “atom”. “atom” is often pronounced “adom” as in “The first atom bomb was dropped on Hiroshima.”（第一顆原子彈落在了廣島。）

　　No.3 “twenty”. “twenty” is often pronounced “twendi” as in “That will be twenty dollars, please.” （請給我二十美元。）

　　No.4 “l(fā)ittle”. “l(fā)ittle” is often pronounced “l(fā)iddle” as in “He got a little angry.”（他有些生氣。）

　　No.5 “city”. “city” is often pronounced “cidi” as in “Did you grow up in the city or the country?”（你在城市還是農村長大？）

　　No.6 “butter”. “butter” is often pronounced “buder” as in “Pass the butter, please.”（請把黃油遞過來 。）

　　When people speak slowly or emphatically, however, they usually pronounce the “t” like “t”, not like “d”.

　　但當人們說的很慢或表強調時，通常發(fā)的更像't' 而不是'd'

　　Also, a “t” does not sound like “d” when it comes before astressed vowel（重讀元音）as in “return”.

　　當't'后有一個重讀的元音時，‘t’ 發(fā)音也不像'd'。

　　This has been today’s daily tip on learning English. Tune in tomorrow for another tip.

一天一點會員口語群5月招生火熱進行中，詳情請點擊鏈接：

招生簡章｜"一天一點"會員口語群5月招生繼續(xù)！

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　　李延隆，新東方教育集團首屆十大演講師之一，“相信未來”“夢想之旅”大型公益講座全國巡講師，集團20周年功勛教師獎得主，集團教學培訓師，集團北美考試管理中心演講師，北京新東方學校元老級資深名師，首屆赴美國訪問團成員，在“新東方在線”及“步步高學習機”錄制的系列英語考試和《新概念英語》課程深受廣大英語學習者喜愛，現旅居澳大利亞美麗的悉尼。

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