Eventually the respiratory bronchioles ends when there are nothing but alveoli, and at that point the airway is called an alveolar duct rather than a respiratory bronchiole.

最终呼吸性细支气管束于肺泡，此时气道被称为肺泡管，而不是呼吸性细支气管。

Once it reaches the lungs, it gets ingested by alveolar macrophages and inside macrophages, it gets wrapped up in a vesicle called phagosome, which normally merges with lysosomes to kill invading bacteria.

入肺内，它就会被肺泡巨噬细胞吞噬；在巨噬细胞内，它被包裹在称为吞噬体的囊泡中，通常吞噬体会与溶酶体融合，清除入侵的细菌。

So the alveolar wall, the basement membrane, and the capillary wall is really all that separates the air from the blood, and this is called the blood-gas barrier.

所以，肺泡壁、基底膜和毛细血管壁将空气和血液分离，这个叫气血屏障。

Alveolar macrophages then eat up these red blood cells, which causes them to take on this brownish color from iron build-up.

肺泡巨噬细胞之会吞噬这些红细胞，导致这些细胞由于铁元素积聚而呈现棕褐色。

Also known as the alveolar approximant sound that we find in words like red, car, and sorry.

也称为齿槽接近音，我们在 red，car 和 sorry等词中能找到这个音。

It has the ability to stop phagolysosomal fusion, and survive and replicate inside alveolar macrophages.

它可以阻止吞噬体和溶酶体融合，从而在肺泡巨噬细胞内存并增殖。

The alveolar wall has a completely different structure from the bronchioles - there are no cilia or smooth muscle, and instead the wall is lined by thin epithelial cells called pneumocytes.

肺泡壁与支气管壁全不同，没有纤毛和平滑肌；相反，管壁内有大量薄层上皮细胞，称为肺泡细胞。

Within days, the measles virus spreads through local tissue and is picked up by dendritic cells and alveolar macrophages, and carried from that local tissue in the lungs to the local lymph nodes.

几天之内，麻疹病毒通过局部组织传播，被树突状细胞和肺泡巨噬细胞捕获，并从肺部的局部组织被带到局部淋巴。

Bacterial growth and death of alveolar macrophages produce powerful chemotactic factors that cause a large influx of polymorphonuclear leukocytes and monocytes from the peripheral blood.

军团菌的增长及肺泡巨噬细胞的死亡产了强大的趋化因子，造成大量多形核白细胞和单核细胞从外周血涌入。

So, bring you tongue tip to your alveolar ridge.

所以，将舌尖带到牙槽嵴上。

The English alveolar approximant, the Spanish trill, the French uvular fricative?

英国的齿槽音、西班牙的颤音、法国的小舌擦音？

So, s and z, where the two parts are the tip of your tongue and the alveolar ridge, which is the hard bit of the roof of your mouth, just behind your top teeth.

所以， s 和 z， 这两个发音部位是你的舌尖和齿龈隆起，也就是你口腔顶部硬的部分，在你上排牙齿面。

Mount, t, t, go to the T. Now, when you make the T, your tongue should be touching the alveolar ridge, touching right here where it comes out.

Mount， t， t， go to the T.现在， 当你做 T 形时，你的舌头应该接触牙槽嵴，正好接触它出来的地方。

They're all produced with the tongue near to or actually touching that ridge behind the upper teeth, which is technically called the alveolar ridge.

它们都是通过将舌头靠近或实际上触及上牙方的齿龈脊发出的，这一部位在语音学上被称为齿龈脊。

Together, the alveolar wall and capillaries make a two-cell-thick membrane that brings blood and oxygen close enough for diffusion.

肺泡壁与毛细血管共同成了一层仅两细胞厚的膜，使血液与氧气紧密接触，便于扩散。

(3) Syllabic consonant: The English liquid [l] and the nasals [m, n] become syllable nucleu when they follow an alveolar consonant or bilabial stop in the last syllable of a word.

(3) 音节辅音：英语流音[l]和鼻音[m, n]在单词最一个音节中跟随齿槽辅音或双唇音塞音成为音节核心。

The partial pressure of carbon dioxide is 40 mmHg in the alveolar air and 45 mmHg in the blood entering the lungs.

肺泡空气中的二氧化碳分压为40 mmHg，入肺部的血液中的二氧化碳分压为45 mmHg。

As you can see below, small capillaries press up against the respiratory zone, bringing the blood close to the alveolar air.

正如你在下面所看到的，小毛细血管挤压着紧贴呼吸区，携带血液紧靠肺泡气。

The alveolar walls are made of extremely thin, flat cells that are surrounded by capillaries.

肺泡壁由极薄且扁平的细胞成，这些细胞被毛细血管所环绕。

In English, the R sound is known as the alveolar approximant, which means the tongue flicks backwards close to the alveolar ridge, but doesn't quite touch it.

在英语中， R 音被称为牙槽接近，这意味着舌头向轻弹靠近牙槽嵴，但并没有全接触它。