When you shine a light on HAL's eyes, his pupils may or may not dilate.

当你用光照射 HAL 的眼睛时，他的孔会根据病情选择性地放大或不放大。

This is where the arteriole walls develop hyaline deposits, which makes it harder for them to dilate.

这是小动脉壁形成透沉积物的地方，使得它们很难扩张。

During totality it's dark, so your pupils have dilated to let more light in.

日食时天空完，你的孔会扩张来让更多的光线通过。

When animals get hot, tiny capillaries near the surface of the skin dilate.

动物热的时候，体表的毛细血管扩张。

Her face went whiter and her brown eyes dilated enormously.

她的脸色更苍白，那双褐色的眼睛也瞪大到了吓人的程度。

These can let through too much infrared and ultraviolet light, and again can dilate your pupils, actually making things worse.

过多的红外线和紫外线都能穿过他们，同样会使孔扩散。实际上让情况更糟糕。

With no need for eye drops that dilate your pupils for hours.

如此一来，你不需要再检查眼睛前滴上散药水了。

Harry could have sworn his over-large nostrils were dilating, trying to sniff Harry out.

哈利敢肯定，他本来就大的鼻孔张得更大了，像要嗅出哈利所在的位置。

The reason behind this is unclear, but nitric oxide makes peripheral arteries dilate, so blood pressure drops.

其中的原因尚不，是，一氧化氮会导致外周动脉扩张，血压因而下降。

If you do try, your muscles will tense and your pupils will dilate and you heart rate will increase.

如果你真的尝试，你的肌肉会紧张，孔会扩张，心率会增加。

The interesting bit is that though your pupils would have dilated you often become effectively blind when you fully engage system two.

有趣的一点，虽然你孔变大，是当你完使用二号系统时，你经常会成为有效率的盲者。

Music has the ability to create a state of arousal, causing pupils to dilate and blood pressure to increase.

音乐能让人产生情绪起伏，使孔扩张，血压上升。

The aorta dilates over time, which is a risk for aortic valve insufficiency, where blood leaks back into the left ventricle during diastole.

主动脉逐渐扩张，这是主动脉瓣关闭不的危险因素之一；这种情况下，舒张期时血将反流至左心室。

Arterioles also have relatively more smooth muscle in their walls, which allows them to constrict and dilate more efficiently.

小动脉壁上的肌肉也相对较光滑，这使它们可以更有效地收缩和扩张。

A fetus with such unrestricted access can manufacture hormones to increase the mother's blood sugar, dilate her arteries, and inflate her blood pressure.

这样无限制的接触， 胎儿能通过控制激素来增加母体血糖， 扩张母体动脉，并提高母体血压。

Also like caffeine, theobromine makes our heart pump faster, our blood vessels dilate, and some of our muscles get more energy, which sounds great!

就像咖啡因，可可碱也会促使我们心跳加快，血管扩张，以及让部分肌肉得到更多能量，这听起来很棒。

This is the most intense phase, but it’s also the shortest, and causes the cervix to fully dilate from 7 cm to 10 cm with 100% effacement.

这是最强烈的一个阶段，也是最短的，宫口从7cm完扩张到10cm，宫颈管100%消失。

The histamine causes blood capillaries to dilate and become leaky which brings more fluid and immune cells to the area where the mast cells are located.

组胺能使毛细血管的通透性增加，进而促进更多的体液和免疫细胞渗漏到肥大细胞所在处。

At first they used a different chemical called amyl nitrite, a compound that we now know has a nitrite group that dilates blood vessels and lowers blood pressure.

起初，他们使用了一种不同的化学物质，称为亚硝酸戊酯，我们现在知道这种化合物有一个亚硝酸盐基团，可以扩张血管并降低血压。

These fast-acting medications cause the smooth muscles in the lungs to relax and therefore dilate the airways, opening them up so that a person can breath.

这些快速起作用的药物可以使肺部平滑肌放松，从而使气道扩张，帮助呼吸。