zài / xiǎn / wéi / jìng / xià / yán / jiū / rén / yuán / guān / chá / dào / le / xì / bāo / de / èr / fēn / liè / guò / chéng在显微镜下,研究人员观察到了细胞的二分裂过程。Under the microscope, the researchers observed the process of cell division by binary fission.