This led them to believe that the cells in the early embryo are undetermined in the sense that each cell has the potential to develop in a variety of different ways.
这使他们相信早期胚胎中的细胞是不确定的，因为每个细胞都有可能以各种不同的方式发育。
2
Small-cell lung cancer is the more aggressive of the two, meaning it can spread quickly to other parts of the body early in the disease.
一种是小细胞肺癌，这种肺癌更具侵袭性，在早期就能扩散到其他器官。
3
Herman, a cell biologist, has been studying pericytes since the early 1980s.