FC Barcelona announced Thursday that Brazilian forward Raphinha has signed a contract extension through June 2028.

MADRID, May 22 (Xinhua) -- FC Barcelona announced Thursday that Brazilian forward Raphinha has signed a contract extension through June 2028.

在人类和小鼠体内，少数造血干细胞（又称为“克隆”）会战胜邻近细胞，逐渐接管血液生产。血液干细胞库不断缩小，并由少数克隆主导，这些克隆更倾向于生成髓系细胞，也就是与慢性炎症有关的免疫细胞。