这颗行星没有白昼和黑夜之分。

'This planet doesn't have days and nights.

youdao

因为冰岛靠近北极，所以冰岛的夏季没有黑夜，冬季没有白昼。

Since Iceland is quite close to the North Pole, there is no darkness in summer and no daylight in winter.

youdao

如果你不能外出，或者你居住得足够远，远到一天仅有几小时甚至没有白昼的北部地区，那么你可以使用全光谱的探照灯，光线或者白色墙壁模式或者是充满生气的重色调色彩来保持光亮。

If you can't, or if you're so far north as to have little or no daylight, use full-spectrum lights, light or white walls, and perhaps some vibrant accent colors.

youdao