Thymus is the central organ of cell immune system. The function of thymus is declined because of age-related involution.
胸腺是免疫系统的中枢控制器官，由于年龄相关的演化，其功能逐渐降低。
Thymus is the central organ of cell immune system. The function of thymus is declined because of age-related involution.
胸腺是免疫系统的中枢控制器官，由于年龄相关的演化，其功能逐渐降低。
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