单词：finite sum
finite sum的用法和样例：
例句
- If it is finite and nonempty, then it must contain at least one idempotent.如果它是有限和非空的，则它必须包含至少一个幂等元。
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A jester of sorts you stand holding your courts Over minions on Capitol Hill In a bath full of blood I'm alone standing still Under God you can fire at will When the devil's angels come To take your life and lead you To the flames beneath Your headst
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