XBB mainly invades the respiratory tract, rather than the digestive system.

XBB 主要侵入呼吸道，而不是消化系统。

But it did replicate rapidly the respiratory tracts of both cats and ferrets.

但病毒确实在猫和雪貂的呼吸道内迅速繁殖。

Then, they face the respiratory tract's first-line defense: the mucociliary escalator.

粘膜纤毛自动扶梯。

There are a lot of upper respiratory tract infections coming coming along with this haze.

伴随着这片烟雾产生了很多上呼吸道感染。

First, the flu virus encounters a new host and makes its way into their respiratory tract.

首先，流感病毒遇到了新的宿主，并进入他们的呼吸道。

By contrast, the entry molecules preferred by influenza viruses are almost exclusive to the upper respiratory tract.

相比之下，流感病毒首选的进入分子几乎只存在于上呼吸道。

And if reflux goes into the respiratory tract, GERD might also present with chronic cough or hoarseness.

如果反流入呼吸道，GERD也可能出现慢性咳嗽或声音嘶哑的症状。

Like the rest of the respiratory tract, the walls of the larynx are made up of mucosal epithelium.

和其它呼吸道上皮一样，喉的上皮也是黏膜上皮。

The mucor fungus grows in the respiratory tract and then spreads to the jaw, eyes and eventually the brain.

毛霉菌在呼吸道生长，之后传播到下巴、眼睛，最后传播到大脑。

Some infections may also have symptoms that affect areas other than the respiratory tract (extrapulmonary manifestations, see complications).

一些感染也可能有影响呼吸道以外区域的症状（肺外表现，见并发症）。