" Jupiter's biggest moon is Ganymede, not Callisto, " she said, pointing over Ron's shoulder at a line in his Astronomy essay, " and it's lo that's got the volcanoes."
Staying focused on science, there's a difference between astronomical winter, what we call the season of winter, and meteorological winter, what meteorologists sometimes call winter.
关注科学,这两者通常是有区别:天文学上冬天,也就是我们常称冬季(season of winter),和气象学上冬天,气象学家有时称之为冬天(winter)。