Right now, galaxies are merrily churning away, converting nebular gas into stars.

现在，星系正在愉快地旋转着，将星云气体转化为恒星。

Finally, this week churning away at the solar-foods facility in Helsinki, Finland is what developers say is a nutrient-rich protein made from thin air.

最后，本周在芬兰赫尔辛基的太阳能食品设施中搅动的，是开发者所说的从稀薄空气中制造的富含营养的蛋白质。