不定数量，不定范围，不定程度。

An indefinite quantity, extent, or degree.

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W3Eval支持带有固定或不定数量自变量的函数。

W3Eval supports functions with fixed and variable number of arguments. Functions are divided into following groups.

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为了处理(消费)队列中的请求，生成了不定数量的工作线程。

A variable number of worker threads are spawned to process (consume) requests off the queue.

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