Also provide some search engine index level operations.
同样还提供了一些搜索引擎索引级别的操作。
The index system consists of 3 levels including goal level; subsystem level and index level totally 25 basic levels.
该指标体系由目标层、子系统层和指标层3个层次构成，共有25个基本指标。
Where possible we also like the flexibility to buy put options at the market index level, again for downside protection.
如有可能，我们同样也愿意在市场指数的水平上购买认沽期权，以进行下跌保护。
TDR was, however, associated with a progression of index-level FJD in a considerable number of patients, particularly at the lumbosacral junction.
然而，对于很大一部分患者而言，尤其在腰骶连接处，TDR与FJD进展有关。
TDR was, however, associated with a progression of index-level FJD in a considerable number of patients, particularly at the lumbosacral junction.
然而，对于很大一部分患者而言，尤其在腰骶连接处，TDR与FJD进展有关。
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