英语：这里的it是指什么呢?There is no sky in June so blue that（ it ）does not point forward to a bluer,no sunset so beautiful that （it） does not waken the vision of a greater beauty,a vision which passes before it is fully glimpsed.六月蔚蓝的天空总使人遥想一个更加蔚蓝的苍穹；美丽的落日总会引起一个更加绚丽的景象,这景象未及饱览就一闪即逝.