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Take a look at these letters.
看看这个字母组合。
They're not always pronounced the same.
它的发音不总是一样的。
Take for example the word 'height':
以单词“height”为例：
here they are the 'ai' as in 'buy' diphthong.
在这里，这个字母组合发双元音[ai]，比如“buy”这个单词里的双元音。
But in this word, weigh, they make the 'ay' as in 'say' diphthong sound.
但是以单词“weigh”为例，这个字母组合发双元音[ei]，比如“say”这个单词里的双元音。
This is why the International Phonetic Alphabet does make it easier to study pronunciation.
这就是为什么国际音标会使发音学习变得更加容易的原因。
This particular video focuses on diphthongs.
这段视频我们重点来学习双元音。
What is the International Phonetic Alphabet?
什么是国际音标？
It's a system of phonetic notation,
国际音标是一个语音符号系统，
and I use it a lot on my website and when I teach students.
我在讲课的时候，我经常在自己的网站上使用国际音标，
I've also used it a lot when I've studied foreign languages.
当我学习外语的时候，我也经常使用国际音标。
The IPA is especially handy when studying English because English is not a phonetic language.
特别是学习英语时，可以随时随地对照国际音标，因为英语不是语音语言。
This means when you see a letter or a group of letters,
这意味着当你看到一个字母或一组字母时，
it will not necessarily always be pronounced the same in each word in which it occurs,
有这些字母存在的每个单词的发音不一定总是相同的，
just as in the example at the beginning of this video.
就像视频开头的例子一样。
The IPA has a written symbol for each phonetic sound,
国际音标对每个语音都有一个书写符号，
so this makes it easier to read about and write about pronunciation.
因此这使得阅读和书写发音符号更容易。
As a student of pronunciation,
作为一个学习发音的学生来讲，
it's important that you become familiar with the symbols that represent the sounds of American English.
熟悉代表美式英语发音的符号是很重要的。
Ow, say that with me, ow. This sound occurs in the words town, round, bow.
[au]，跟我一起读，[au]。单词town，round，bow都有双元音[au]。
Oh. Say that with me, oh. This sound occurs in the words though, no, show.
[əu]，跟我一起读，[əu]。单词though，no，show都有双元音[əu]。
Oy, oy. This sound occurs in the words toy, moist, joy.
[ɔi]，[ɔi]。单词toy，moist，joy都有双元音[ɔi]。
Ai, ai, This diphthong sound occurs in the words my, height, buy.
[ai]，[ai]，单词my，height，buy都有双元音[ai]。
Ay, ay. This sound occurs in the words fade, maid, gauge.
[ei]，[ei]。单词fade，maid，gauge都有双元音[ei]。
Yu, yu, this sound occurs in the word beauty, union, feud.
[ju]，[ju]，单词beauty，union，feud都有双元音[ju]。
Great. Familiarizing yourself with these symbols should make it easier to study pronunciation.
非常棒。熟悉这些语音符号会使你更容易学习发音。
That's it, and thanks so much for using Rachel's English.
就这样了，谢谢你使用瑞秋英语。
