So this is the unvoiced 'th' sound.

这就是清辅音“th”。

This is called the unvoiced TH sound.

这被称为不发音的 TH 音。

We do that when the sound before is unvoiced.

当其前面的音为不发音时，我们会这样做。

So that is an unvoiced sound.

所以那是个清音。

So when should you use the voiced or the unvoiced sound?

那什么时候该使用清辅音，什么时候该使用浊辅音呢？

It happens in the past tense when verbs end with an unvoiced sound.

这发生在过去式中动词以清音结尾的情况。

The voiced TH sound is almost exactly the same as the unvoiced TH sound.

浊 TH 音和轻 TH 音几乎完全一样。

Now as I mentioned, there are two 'th' sounds, a voiced sound and an unvoiced sound.

正如我之前所说，“th”有两种发音，一种是浊音，一种是清音。

Now they're all unvoiced sounds and so they're made by pushing air through your mouth.

它们都是清辅音，所以它们都是通过空气流过口腔发出的。

That's an unvoiced sound and voiced sounds are stronger than weak sounds.

那是清音，浊音比微弱的声音强。

So I actually hear this as an S. It's been shifted into an unvoiced sound. Tries to, tries to.

所以我实际上听到的是 S。它已被转换为清音。试图，试图。

Your mouth and your tongue are in the same position as for the unvoiced TH sound, but if you put your hand on your throat, you will feel vibration: th.

TH 音不论出不出声，你的嘴和舌头都处于相同的位置，但如果你把手放在喉咙上，你就会感受到振动：TH。

So, if the sound before the letter T and the word to is unvoiced like here, S is an unvoiced sound S, then the T will probably be a true T.

所以，如果字母 T 之前的声音和的单词像这里一样是清音，S 是清音 S，那么 T 很可能是真正的 T。