What's shown in this diagram is the progress of the developing embryo as it travels in time, down the fallopian tube.

这张图上显示的,就是胚胎发育的过程,是按照它在输卵管中移动的时间排序的

耶鲁公开课 - 生物医学工程探索课程节选

Fertilization of these two where these two cells join occurs in the distal part of the fallopian tube.

受精的过程,就是这两种细胞,在输卵管壶腹部相互结合

耶鲁公开课 - 生物医学工程探索课程节选