Only up to a point. Conventional index-tracking has a logical advantage on its side: a value-weighted index represents, by definition, the performance of all investors.

只有达到这么一点，传统的指数跟踪在这方面有一个逻辑优势：按照定义，一个以价值为权重的指数代表所有投资者的业绩。

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Optimizing casing retrieving depth and side-tracking point by minimum cost method due to different kinds of abandoned Wells.

根据不同类型报废井，按最低成本法优选取套深度和侧斜点。

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Optimizing casing retrieving depth and side-tracking point by minimum cost method due to different kinds of abandoned Wells.

根据不同类型报废井，按最低成本法优选取套深度和侧斜点。

youdao