What are Moon phases?According to NASA, the Moon takes about 29.5 days to orbit the Earth. Over the course of this period, it moves through eight recognisable phases. While the same side of the Moon always faces us, the amount of its surface lit by the Sun changes as it continues along its path. The shifts in sunlight create the different appearances we see from Earth, ranging from a fully illuminated Moon to a thin sliver or near darkness. The eight phases are:
'Crushing blow'
，详情可参考同城约会
区域红利观察：一线城市与新兴增长极的差异化机遇
Introduction to events: event propagation — MDN Web Docs
政绩观，连着发展观。政绩观正确与否，决定着发展的成效乃至成败。