The sun must have gone down behind the houses; it was not shining into the yard any longer.
太阳已经沉到房后去了，院子里不再照射到阳光。
Some PV systems are designed to provide power to loads even when the sun is not shining, and these typically use battery storage.
即使不出太阳，一些光伏（PV）系统也能够为负载提供动力，这些系统通常使用蓄电池。
Some PV systems are designed to provide power to loads even when the sun is not shining, and these typically use battery storage.
即使不出太阳，一些光伏（PV）系统也能够为负载提供动力，这些系统通常使用蓄电池。
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