名词
中文翻译：封闭的游戏
同义词：
['closed system', 'closed loop', 'sealed off']
例句：
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1.The closed game was a puzzle that only the experts could solve.
这个封闭的游戏是一个只有专家才能解开的谜题。
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2.The closed game is a metaphor for a situation where no one can escape or leave.
封闭的游戏是一个人无法逃脱或离开的情况的隐喻。
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3.The closed game was so complex that even the best programmers struggled to crack it.
这个封闭的游戏是如此复杂，以至于即使是最好的程序员也难以破解。