These tubules are the sperm factories, made of a stratified epithelium surrounding a central fluid-filled lumen.

这些小是精子工厂，由围绕充满液体中央腔分层上皮组成。

Having little water in the lumen, creates a relatively high potassium concentration in the lumen.

水份较少时，腔中钾离子浓度应升高。

This means that phosphate is left in the lumen and eventually gets sent out in the urine.

这意味着磷酸盐留在腔内，最终通过尿液排出。

They can put out up to 100 lumens per watt.

它们可以输出高达每瓦 100 流明。

Finally, there's an inner ring of luminal columnar cells, which are within the lumen or center of the gland.

最后是一层腔柱状细胞，位于腔内或腺体中央。

Also, though, these vessels can relax or vasodilate, and the lumen's diameter increases, which allows more blood flow.

不过，这些血也可以舒张，即血舒张，以扩大腔直径，让更多血液流过。

An equivalent CFL will get you way more, between 55 and 70 lumens per watt.

等效 CFL 将为您提供更多，每瓦 55 至 70 流明。

Now, that calcium's still in the lumen, but parathyroid hormone also affects the distal convoluted tubule and increases calcium reabsorption.

这时，钙仍然在腔内，但甲状旁腺激素也影响远曲小，增加对钙收。

But in this case, the sperm develop on the outer edge of the tubule, and progress inward toward the lumen.

但是在这种情况下，精子在小外缘发育，并向内腔前进。

So this means that phosphate is left in the lumen and eventually gets sent out in the urine.

这意味着磷酸盐留在了腔内，最终通过尿液排出体外。

We call these luminescent substances, from the ancient Roman word, lumen, which means light.

我们称这些发光物质为古罗马词“lumen”，意思是“光”。

In addition, these diuretics also allow more water to remain in the lumen, creating a relatively low potassium concentration in the lumen.

此外，这些利尿剂也允许更多水保留在腔内，造成腔内对低钾浓度。

This causes a decreased blood flow through its lumen, or hollow center.

这导致通过其内腔或中空中心血流减少。

The CR Revelation lighting package can produce up to 48,000 lumens in total, with as many as 27 LED lights.

CR Revelation 照明套件总​​共可产生高达 48,000 流明光，配有多达 27 个 LED 灯。

Different varieties of tracheostomy tubes include cuffed, non cuffed, double lumen tubes, tubes with speaking valves, metallic tubes, and so on.

不同种类气造口包括带套囊、没有套囊、双腔、带发声阀、金属等。

Now, that calcium's still in the lumen, though, but parathyroid hormone also affects the distal convoluted tubule and increases calcium reabsorption.

现在，钙仍然在腔内，但是甲状旁腺激素也影响远曲小增加钙收。

A narrow lumen means less blood and oxygen gets delivered to the kidney, resulting in ischemic injury to the nephron's glomerulus.

腔狭窄意味着对肾供血供氧减少，导致肾单位中肾小球缺血性损伤。

Bicarbonate helps neutralize the acidic chyme, and raising the pH in the intestinal lumen also helps digestive enzymes work more effectively.

碳酸氢盐能够中和酸性食糜，还能提高肠腔内pH值；这也可以提高消化酶活性。

But the other kind — the type B's — get pushed down the tubule toward the lumen, and turn into primary spermatocytes.

但是另一种，B 型，则是沿着细进入腔，然后变成初级精母细胞。

Both the cells of the tunica intima and tunica media generally get the nutrients they need from the blood in the lumen.

内膜和中膜细胞，都能从腔内血液中获取所需营养物质。