This has a voiceless TH at the end.

这个末尾有一个不发的 TH 。

I started this to provide a voice to the voiceless.

我开始这样做是为了给那没有发言权的人提供一个发言的机会。

Now, this video focuses on voiceless consonants.

这段视频的重点是清。

When the word ends with a voiceless consonant, then we add an S.

当单词以清结尾时，我们的发是/s/。

Voiceless people realized that they had a voice, and it was powerful and eloquent.

欲言处诉的人识到自己有话语权了，而且还能声势浩大、振振有词。

Mr Snyder's book straightens the record in favour of the voiceless and forgotten.

Snyder的大作理清了曲直，只为那法出声或被忘却的冤魂。

Hey, did you bring that — Sweet tears, a voiceless consonant.

嘿，你带来了——Sweet tears，/teə(r)/是清吗？

But this video will focus on the voiceless consonants.

但这段视频的重点是清。

Either two voiceless consonants or two voiced consonants.

两个清或两个浊。

The vocal cords are vibrating just as the S is voiceless and the Z is voiced.

声带在振动，就像/s/是不发声的，/z/是发声的。

And there's so many who are voiceless and there's so many who are incapable of action.

很多人都没有发言权，他们没有行动能力。

In English, we say the voiceless sound with a puff of air.

在英语中，我们发清的时候会有一股气流。

Now, there are two types of THs: one that is voiced and one that is voiceless.

TH 有两种发：一种是浊，一种是清。

Scientists also used to think that turtles were voiceless and mother turtles abandoned their nests after laying their eggs.

科学家以前也认为龟是不会发声的，而且龟妈妈会在孵化了蛋以后弃巢。

You pass messages, and talk about the suffering of the people, and be the voice of the voiceless, basically.

你可以通过hip-hop传达信息，诉说人民的疾苦，为那有苦处说的人们传递声。

So try this: find me a tongue sound, a lingual, that's clear, meaning voiceless, and has the first tone.

帮我找一个声母属于「舌」， 也就是（现代语言学的）舌冠，「清」的，也就是清，属于第一种声调的字。

Listen carefully to hear the difference. For each example I shall say the word with the voiceless sound first.

仔细听其中的区别。每一组例子我会先读有清的单词。

Now when the -ed suffix appears after a voiceless consonant.

现在我们来看看“ed”后缀出现在一个清之后的情况。

With the voiceless sound there is a big puff of air. You can feel it with your hands.

读清的时候有一股气流。你可以用手感受下。

The Pakistani teenage campaigner for girls' education Malala Yousafzai said her award was for the voiceless children of the world.

支持女孩教育权利的巴基斯坦儿童活动家马拉拉·优素福称她的奖品要送给全世界不能为权利发出呼声的孩子们。