Respiratory difficulty may gradually increase with signs of upper airway obstruction, in other words, suprasternal and intercostal recession.

伴随着上道阻，困难可能会逐渐加重，胸部三凹征明显。

When you breathe in, your diaphragm contracts, pulling itself flat, and your external intercostal muscles between your ribs contract.

当你气时，你的横膈膜收缩，把自己拉平，肋骨之间的外部肋间肌肉收缩。

Before I dive, I go through a whole preparation and that will include stretching of the body, stretching of the lungs, the diaphragm, intercostal muscles.

在潜之前, 我会做一个完整的准备活动，包括身体的伸展，肺、膈肌和肋间肌的拉抻。

Then, if you place a stethoscope in the left second intercostal space, at the left upper sternal border, you can hear the pulmonary valve closing.

然后，你将听诊器放到左第二肋间隙，在左胸骨上缘，你将听到肺动脉的声音。

In addition to the diaphragm, external intercostal muscles are muscles located on the outside of our ribs, and they expand the chest.

除了横膈膜，肋间外肌是位于肋骨外侧的肌肉，它们可以扩张胸部。

Before I dive, I'll go through a whole preparation and that will include stretching of the body, stretching of the lungs, the diaphragm, intercostal muscles.

在我潜之前，我会做一个完整的准备工作， 包括伸展身体、伸展肺部、横膈膜和肋间肌。

And as soon as I move on top of the ribcage and between the intercostal muscles, which is softer and harder, I can feel the difference of the stiffness.

当我在胸腔顶部和肋间肌之间移动时，较软和较硬，我就能感觉到僵硬的差异。

If you place a stethoscope between the second and third rib, known as the right second intercostal space, just next to the upper border of the sternum, you'll hear the aortic valve closing.

如果你将听诊器置于第二肋及第三肋之间，被称为右第二肋间隙；紧靠胸骨上缘，你将听到主动脉的声音。

The midclavicular line is the imaginary line that gets drawn from the midpoint of the left clavicle, or the collarbone, straight down, and you can find where it intersects with the fifth intercostal space.

锁骨中线是一条从左锁骨中间位置笔直画下来的假想线，你可以找到它与第五肋间隙相交的位置。