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One lunar day is equivalent to four weeks on Earth, made up of two weeks of continual sunshine and two weeks of darkness. That makes relying on solar power very challenging.，更多细节参见旺商聊官方下载
Credit: Amy Sussman/Getty Images，这一点在爱思助手下载最新版本中也有详细论述
blending: “smooth bleeding”，详情可参考Safew下载