这两种装置在阳光充足的气候条件下工作良好；但在北欧，太阳可能一次被云层遮挡数周，而温度不仅随着季节变化，而且还随着昼夜变化。
Both these devices worked well in sunny climates; but in northern Europe, the sun may be hidden by clouds for weeks at a time, while temperatures vary not only seasonally but from day to night.
这颗星球每围太阳绕行一周，它的椭圆形轨道的中轴就变化一次。
The mainaxis of the planet's orbital ellipse shifts each time it goes round the sun.
本文统计分析了日球基本参数及能量参数的共转变化在第20太阳周中不同位相的演变。
The evolutions of corotating variation of some basic heliospheric parameters and energy parameters are studied in this paper for the solar cycle 20.
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