As the piston lowers, air and fuel are sprayed into the cylinder's chamber.

活塞下降时，空气和燃料会喷入汽缸腔内。

Inside this cavity, certain cells release digestive enzymes, and the food is broken down.

在这个腔内，某些细胞释放消化酶，食物。

On imaging, the mass is typically within the medullary cavity.

在影像上，肿块通常位于髓腔内。

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。

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，但甲状旁腺激素也会影响远曲小管，增加对钙的再吸收。

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会影响远曲小管增加钙的再吸收。

These branching organs typically come in four pairs, all enclosed in gill chambers.

这些支器官通常成对出现， 共有四对，全部包裹在鳃腔内。

The jellyfish body is mainly composed of mesoglea, a jelly-like fluid sandwich between the outer ectoderm and the inner digestive cavity the endoderm.

水母的身体主要由中间胶质组成，中间胶质是一种果冻状的液体，夹在外外膜和内消化腔内膜之间。

Treatment is surgical and involves a procedure called fasciotomy, where the fascia is cut open, relieving the pressure and reestablishing normal blood flow.

治疗需要手术，包括筋膜切开术，即切开受损处的筋膜，释放腔内压建正常血流。

If there's excess fluid in the pleural space it absorbs some of this vibration energy, and the vibrations can't be felt as strongly.

如果胸膜腔内有过量的液体，液体可吸收部震动，使震动减弱。

Some of these sacs sat in the body cavity, next to bones, usually in the neck, back, and hips.

其中一些气囊位于身体腔内，靠近骨头，通常在颈部、背部和臀部。

This tissue is the birthplace of red blood cells, and it can be found enclosed within our bone marrow cavities.

这种组织是红细胞的发源地，位于我们骨髓腔内。

That's when pericardial fluid begins to pool in the pericardial space, because the serous pericardium can't remove it as quickly as it comes in.

心包积液是渗出液在心包腔内累积的结果，因为浆膜心包吸收积液的速度小于液体渗出的速度。

In order to understand how we breathe, we need to understand the different spaces and pressures within our thoracic cavity.

了人体呼吸机制前，我们需要理不同的间隙与胸膜腔内的压。

When the pericardium is involved, it often leads to pericarditis —inflammation of the pericardium— and pericardial effusion, an accumulation of fluid in the pericardial cavity.

当转移到心包时，通常会导致心包炎，即心包感染引起的炎症，引起心包积液，即在心包腔内积聚液体。

The remainder of the breath passes through the device. We then release the molecules that we're interested in into the cavity to make the measurement.

而其余部也会通过这个设备。然后我们释放我们感兴趣的子进入腔内进行测量。

We now believe, like Nautilus, ammonites had tentacles, well-developed eyes, and used the chambers inside their shells for stability in the water.

我们现在相信，像鹦鹉螺一样，菊石也有触手、发达的眼睛，利用壳内的腔室在水中保持稳定。

If neither of these approaches are successful, sometimes people might benefit from injections of hyaluronic acid into the joint or may need surgery to replace the affected joint.

如果这些治疗方法都效果不佳，往关节腔内注射透明质酸可能有帮助，也可能需要手术，对受损关节进行替换。

On an echocardiogram, a pericardial effusion makes the heart look like it's dancing within the pericardium, whereas chronic pericarditis shows the stiff serous pericardium restricting the heart's movement.

超声心动图下，心包积液致使心脏如同在心包腔内“舞蹈”；而慢性心包炎表现为增厚的心包限制心脏活动。

Alright, as a quick recap - a pleural effusion is when fluid collects in the pleural space around the lungs, restricting expansion and causing pain and difficulty breathing.

得！快速回顾一下：胸腔积液是指液体汇聚于包绕在肺周围的胸膜腔内，限制肺扩张，造成胸痛和呼吸困难。