求翻译：它主要介导前体细胞分化的抑制信号，参与神经系统发生、肌形成、内分泌及外分泌细胞分化、T细胞的胸腺选择等重要生理过程.(1,2)是什么意思？

It is mainly mediated by the inhibition of precursor cell differentiation signals occur in the nervous system, muscle formation, endocrine and exocrine cells, t cells thymus selection and other important physiological processes. (1,2)

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Front it mainly lies between leads the somatic cell differentiation blanket, the participation nervous system occurs, myo- forms, endocrine and the exocrine cell differentiation, the T cell thymus choice and so on the important physiological process. (1,2)

It is mainly mediated differentiation of progenitor inhibitory signals, participate in the nervous system, endocrine and exocrine cell differentiation, muscle formation, thymic selection of t-cells, and other important physiological processes. (1,2)