淋巴球减少症

例句：

1. 1.Lymphocytes play a crucial role in the immune system.
   淋巴细胞在免疫系统中起着至关重要的作用。
2. 2.The study found that the number of lymphocytes in the blood can indicate an underlying health issue.
   研究发现，血液中淋巴细胞的数量可以指示潜在的健康问题。
3. 3. Infections often cause a decrease in lymphocytes, leading to weakened immunity.
   感染通常会导致淋巴细胞数量减少，从而削弱免疫力。