Since Earth is closer to the sun than Saturn, only the day side of the planet is visible from the Earth.

因为地球离太阳的距离比土星更近，在地球上只能看到土星的昼半球。

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Sometimes, the side facing the Earth is the day side, and other times it is the night side: this is why we observe moon phases.

有时，面对着地球的是“白天半球”，其它时间则是“夜晚半球”：这就是我们为什么只能阶段性地观察月球。

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Second, winds would distribute heat from the permanent day side of Gliese 581d to the permanent night side, preventing freeze-out.

第二，风会将格雷司581d永久白昼面的热量带到永久黑夜面，这样就防止了冻析的发生。

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On the last day of April, the Union troop boats began carrying soldiers to the east side of the river.

VOA: special.2009.11.19

We've never really been a great one-day side so hopefully we can kick-start that now.

BBC: Paul Collingwood column

He has not played in the one-day side side since the away series against Australia in March.

BBC: Tendulkar rested for one-dayers

Pietersen has been greatly encouraged by the way his team has played to beat the world's second-ranked one-day side.

BBC: Pietersen focuses on more success