Thymus

例句：

1. 1.Thymus is a gland located in the chest cavity.
   胸腺位于胸腔内。
2. 2.The function of thymus is to produce T cells.
   胸腺的功能是产生T细胞。
3. 3.Thymus plays a crucial role in immune system development.
   胸腺在免疫系统发育中起着至关重要的作用。