可见太阳的时数（黑线）。 从下（最深的黄色）至上（最深的灰色），颜色带表示：全日光、曙光/暮光（民用、航海和天文）和全黑夜。Bankrate.com can be an independent, advertising and marketing-supported publisher and comparison services. We've been compensated in exchange for placement of sponsored