And this dub is called the second heart sound, or S2.

这个“dub”声被称为第二心音，或S2。

Try to pronounce the second sound immediately after you release the first sound.

试着在发出第一个声音后 立即发出第二个声音。

This is the only way you'll actually get to the second sound if you visualize a W sound.

如果你想象 W 音，这是得到第二个音的唯一方法。

The most noticeable difference is the second sound is a long vowel and I smile a little bit more.

最明显的区别是第二个音，这是一个长元音，我的嘴巴咧得更开。

Then we quickly go through the second sound, the Y glide, and the schwa on the way to the P sound. Yuh. I-yuh.

然后我们快速通过第二个声音，Y 滑音，以及通往 P 声音的 schwa。 嗯。 我-嗯。

As pleasurable as those 300 seconds sound, your uncle was already generous enough to help the strange American you brought home from Prague.

听起来这300秒能让我们更愉快，你叔叔已经够大方了能够帮助一个从布拉格带来的素不相识的美国人。

My mind was made up in an instant, and I was at the top of the strong-room stairs, the knocking still continuing, when a second sound drove me back.

我立刻下定决心， 走到保险库楼梯的顶端， 敲门声还在继续， 这时第二声响声把我赶了回来。