This year it will be four centuries since Galileo discovered Jupiter's four large satellites, at a stroke quintupling the number of moons then known to humanity.
今年距离伽利略发现木星的四颗大卫星整整400年，突然间人类发现了数倍于其数量的卫星。
This year it will be four centuries since Galileo discovered Jupiter's four large satellites, at a stroke quintupling the number of moons then known to humanity.
今年距离伽利略发现木星的四颗大卫星整整400年，突然间人类发现了数倍于其数量的卫星。
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