人类在接近各个星球，探索新的天体。Man was drawing closer to the stars, opening new worlds.这份天体图标明了北半部所有的星座.The map of the heavens showed all the northern constellations.在太空, 一切天体都相互吸引.In space, all bodies attract other bodies....
The conditions are ripe for the spread of disease.这种疾病传播的条件已经成熟。The disease wiped out 40 million rabbits at a stroke.该疾病一下子就使4,000万只兔子丧命。Depression lowers the human ability to cope with disease.抑郁症会降低人体对疾病的抵抗力。...