木星的衛(wèi)星木衛(wèi)二好像有流動的海洋.Europa a moon of Jupiter, appears to a liquid ocean.科學(xué)家們發(fā)現(xiàn)關(guān)于木衛(wèi)二的什么信息?What have scientists found about Europa a moon of Jupiter?在木星的外圍軌道上, 這些衛(wèi)星是木衛(wèi)一 、 木衛(wèi)二 、 木衛(wèi)三和木衛(wèi)四.In their outward order from Jupiter, the...