淋巴孤结

例句：

1. 1. The immune system relies on the lymphoid cells to fight infections.
   免疫系统依赖于淋巴细胞来抵抗感染。
2. 2. Lymph nodes are important for filtering out bacteria and viruses from the bloodstream.
   淋巴结对于过滤血液中的细菌和病毒非常重要。
3. 3.In some cases, cancer can spread through the lymphatic system, causing distant metastases.
   在某些情况下，癌症可以通过淋巴系统传播，导致远处转移。