To differentiate, the fork system call returns 0 in the progeny but returns the process ID of process Z to the progenitor.
为了以示区别，fork系统调用在子进程中返回0，但返回给父进程的却是进程z的进程ID。
Specifically, they found the virus in hematopoietic progenitor cells (HPCs) -the mother of all immune system cells.
尤其是在定向造血干细胞(所有免疫系统细胞的母体)中找到了病毒。
It could differentiate into various hemopoietic progenitor cells, and in the lifetime provided new cells for hemopoietic system.
其主要功能是通过不断分化产生各系造血祖细胞，终生为造血系统提供新细胞来源。
"The enzyme we were looking at is expressed in the progenitor cells in the bone marrow that give rise to all the different types of cells in one branch of the immune system, " Pure notes.
“我们所观察的酶来自于骨髓前体细胞，该前体细胞可分化成免疫系统一类不同的细胞类型，”Pure认为。
To be the reflecting of fete progenitor, temple system and tomb system are in a change period, which lead the sacrificial active was changed with them.
作为祭祖行为外在物化体现的宗庙制度、陵寝制度在两汉正处在变革时期，祭祖活动也随之发生变化。
Nestin is abundantly expressed in the proliferated progenitor cell of the central nervous system and peripheral nervous system, and deficiently expressed in the mature nervous system.
巢蛋白被中枢神经系统和周围神经系统大多数增殖活跃的前体细胞所表达，发育成熟的神经系统巢蛋白表达降低。
Nestin is abundantly expressed in the proliferated progenitor cell of the central nervous system and peripheral nervous system, and deficiently expressed in the mature nervous system.
巢蛋白被中枢神经系统和周围神经系统大多数增殖活跃的前体细胞所表达，发育成熟的神经系统巢蛋白表达降低。
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