It started not really as a planned system not planned by any government.

出于经验才产生的机构,它并不是在一个计划好了的系统中生成的。

耶鲁公开课 - 金融市场课程节选

Some form what are called megakaryocytes which become platelets, which are responsible for clotting, for forming a barrier if your circulatory system gets injured so you don't bleed.

还有一些类型的细胞称为巨核细胞,生成有凝血作用的血小板,在你的循环系统受损时形成止血屏障

耶鲁公开课 - 生物医学工程探索课程节选

They might be capable of forming all of the cells of the nervous system; they might still have some potency to form other things that are similar to the nervous system.

它们也许可以生成,所有神经系统的细胞,也许还有一些生成和神经系统类似的,其他东西的潜能

耶鲁公开课 - 生物医学工程探索课程节选