zài / xiǎnwēijìng / xià / yánjiūrényuán / guānchá / dào / jīngchóng / zhèngzài / xiàng / luǎnxìbāo / yídòng

在显微镜下，研究人员观察到精虫正在向卵细胞移动。

Under a microscope, the researchers observed sperm moving toward the egg cell.