凯文和他的弟弟艾伦在后院踢足球。
Kevin and his brother Alan were playing soccer in the backyard.
凯文和艾伦从来没有意识到夜空会如此美丽。
Kevin and Alan had never realized how fantastic the night sky could be.
凯文和艾伦从来没有想过会有这样一个没有电的夜晚。
Kevin and Alan had never thought of having such a night without electricity like that before.
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