Threat of intense segment rivalry: a segment is unattractive if it already contains number of strong or aggressive competitors.
区间内激烈竞争的威胁：如果区间内已存在几个强大的、有攻击性的竞争者，它就不怎么好。
Threat of intense segment rivalry: a segment is unattractive if it already contains number of strong or aggressive competitors.
区间内激烈竞争的威胁：如果区间内已存在几个强大的、有攻击性的竞争者，它就不怎么好。
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