Say this one short with a " ss" sound, and this one is longer with a " zz" sound.

比较短的元音发「ss」音，比较长的元音则是发「zz」的音。

'It is' or 'it has' is 'it's', 'it's', this is the 'ss' sound, not the 'zz' sound.

“It is”或“it has”的缩略形式是“it's”，这里发“ss”的音，而不是“zz”的音。

You might not hear it, but there's a little bit of a " zz" sound at the end of that.

你可能听不到，但结尾的确有「zz」的音。

There is an s, but it sounds a little but more like a " zz" sound.

有一个s，但听起来有点但更像“zz” 的声音。

In " dog" , because of the " g" , the " s" becomes a " zz" sound, as in a " z" .

「dog」，因为有「g」，「s」发音会变成「zz」就像「z」。

But, as she and he both finish with a vowel sound, which is voiced, we need to use the zz sound.

但是，由于 she 和 he 都以元音结束，这是浊音，我们需要使用 zz 声音。

Focus on the 'zz' sound at the end, a common mistake I hear is a 'ss' sound, it's not 'he'ss' or 'she'ss', it's 'he's', 'she's'.

请注意末尾的“zz”音，我听到的常见错误是发“ss”音，不是“he'ss”或“she'ss”，而是“he's”，“she's”。

We also know that colour coding is used to help recognise common sounds, and that the letter s has an ss sound and zz sound.

我们还知道颜色编码用于帮助识别常见的声音，字母 s 有 ss 音和 zz 音。