(单词翻译:单击)
Hello. I'm John Russell.
你好。我是约翰·罗素。
Today we are exploring two difficult sounds, f and v.
今天我们要探索两个比较难的发音“f”和“v”。
Mixing up these sounds can change the meaning of a word.
这些声音混合在一起可以改变一个单词的意思。
Here's an example, Ferry, Very, Fat, Vat.
这里有一个例子，摆渡、非常、肥胖的、增值税。
F and v are called fricative.
“f”和“v”是摩擦音。
This means that as you push air from your mouth, you use your lips and teeth to change the flow of air.
这意味着当你从嘴里把空气推出来时，你需要用嘴唇和牙齿来改变空气的流动。
In both of these sounds, you put your top teeth onto your lower lip.
在这两种声音中，你都要把你的上牙放到你的下嘴唇上。
The difference between the sounds is this: f is voiceless, and v is voiced.
这两个字母发音的区别是：发f的时候，是没有声音的，发v的时候，是有声音的。
In other words, you shouldn't feel your throat move when you make the f sound, but you should feel it move when you make the v sound.
换句话说，当你发出f声音时，感觉不到声带震动，但是发出v的声音时，声带会震动。
Make sure you are biting down with the correct pressure.
一定要用合适的力咬下去。
Brad Knieriem a pronunciation expert says you can also practice these sounds by focusing on the vowel sound that comes before f and v.
发音专家Brad Knieriem说，你也可以通过关注字母f和v之前的元音来练习这些声音。
And when you have a vowel sound before f, it's usually a shorter sound.
当f前面有一个元音字母的时候，它通常是一个较短的声音。
When you have a vowel sound before v, it's usually longer.
当v前面有一个元音字母的时候，它通常是较长的。
For example, the word leaf and leave, you can hear how the vowel sound in "leaf", it's very short, but "leave" it's longer.
例如，单词Leaf和Leave，你可以听到“leaf”中的元音发音，它很短，但是“leave”要长一些。
So even if the two f and v sounds are hard to pronounce, you can focus on pronouncing the vowel sound correctly to help people understand.
所以即使f和v这两个音很难发音，你也可以把重点放在元音的正确发音上，以帮助人们理解你的表述。
Listen for the f and v sounds in the following sentence.
请听下面句子中f和v的发音。
Your pronunciation will move forward very far, if you focus on these very hard sounds.
如果你把注意力放在这些很难的音上，你的发音会进步很多。
Keep up the good work. Bye.
继续加油，再见！
