To assign an N stage, doctors evaluate the lymph nodes through biopsies and imaging.

在进行 N 分期时，医生会通过活检和成像对淋巴结进行评估。

And as the virus spreads, it invades the lymph nodes and vital organs, such as kidneys and liver, causing them to lose function.

病毒扩散时它入侵淋巴结和重要器官，比如肝和肾，使其功能衰竭。

You also don't see large lymph nodes in the mediastinum or near the hilum or central part of the lung, which are often seen in other types of pneumonia.

另外，纵隔、肺门或者肺中部淋巴结肿大也很少出现，而这些在其它类型的肺炎中则很常见。

It's his lymph nodes we're concerned about.

我们得关注他的淋巴结。

Doctors utilize a system which uses the letters T, N, and M to describe a tumor's size, its presence in the immune system's lymph nodes, and whether it has metastasized, or spread, to other organs.

医生使用一种系统，用字母 T、N 和 M 分别描述肿瘤的大小、在免疫系统淋巴结中的存在情况、以及是否转移或扩散到其他器官。

Or— perhaps most painfully— cautery, which involved lancing the lymph nodes with a red-hot poker to release the blackened pus within.

或者——也许是最痛苦的——烧灼术，它涉及用烧红的拨棒切开淋巴结以释放里面变黑的脓液。

There are also circulating T cells, which are another type of lymphocyte that move between the lymph nodes, lymph, and blood on the lookout for pathogens and infected or abnormal cells that have been tagged by antibodies.

也有循环中的T细胞，这是另一类在淋巴结、淋巴和血液之间移动的淋巴细胞，负责侦查被抗体标记的病原体、被感染或异常细胞。

B cells are designed to only react to foreign antigens, and if the dendritic cell presents something foreign, the B cell turns into a plasma cells and starting cranking out antibodies which then flow into the lymph and exit the lymph node.

B细胞仅仅用于对异体抗原起反应，并且如果树突状细胞呈递异体物质，B细胞就会转变为浆细胞，开始制造抗体而抗体随淋巴流出淋巴结。