(单词翻译:单击)
Hello, I'm John Russell.
大家好，我是约翰·罗素。
Let's explore the difference between two vowel sounds: /u/ and /u:/.(注：此音标写法为便于编辑，正确写法见视频)
让我们来看看元音/u/ 和/u:/的区别。（注：此音标写法为便于编辑，正确写法见视频）
In previous videos, I described the /u/ vowel sound as the sound of models, and the /u:/ vowel sound as the sound of schools.
在之前的视频中，我将/u/的音描述为模特的声音，将/u:/的音描述为学校的声音。
But let's explore the difference between these sounds in a little more depth.
让我们更深入地探讨一下这两个音之间的区别。
Let's start with the tongue.
我们先从舌头说起。
Both sounds have a high tongue position at the back of the mouth.
这两个音发音时舌头都需要在嘴巴后部，稍微抬高。
But to make the /u:/ the sound, your tongue should be a little higher.
但要发/u:/的音时，你的舌头需要更高一些。
There is also an important difference in the lips.
嘴巴形状也有很重要的区别。
When you make the /u/ sound, your lips should be a little more relaxed.
发/u/的音时，你的嘴唇应该稍微放松一点。
For the /u:/ sound your lips should be more tense. /u/ /u:/
发/u:/的音时，你的嘴唇应该更绷紧一些。
/u/ is more of a pure vowel sound, whereas /u:/ is a vowel that is followed by a very faint semi-vowel, sometimes called an off-glide.
/u/更像是一个纯元音，而/u:/是一个元音，后面跟着一个非常微弱的半元音，有时被称为滑音。
That is why some pronunciation books spell the /u:/ sound as /uw/.
这就是为什么一些发音教材上会把/u:/写成/uw/。
One problem is that /u/ and /u:/ vowel sounds have some similar spelling patterns.
有一个问题是/u/和/u:/音有一些相似的拼写模式。
Both can have "oo" spellings, as in: neighborhood, school.
都有“oo”组合，例如单词：neighborhood、school。
And both can be spelled with the letter "u", as in: push, super.
两个音都有字母“u”发出来的情况，例如：push、super。
You can practice making the difference between these sounds with short words.
你可以用短词来练习，区分这两种发音。
For example, try saying "good food". (good food)
例如，试着说“好吃的”。（/u/ /u:/）
That's all for today.
今天就到这里吧。
Keep up the good work.
继续加油。
