reverse index

search engine is based on mongodb do a very good choice, use it to create reverse index billions of web pages is a breeze!

基于mongodb做搜索引擎也是非常好的选择，用它给数以亿计的网页建立反向索引也是轻而易举的事情！！！

why would a reverse index be useful when the leading column of the index is generated from a sequence ?

当索引第一列由序列产生，一个逆序索引有什么用？

for look-ups using other keys, consider using a global reverse index.

使用其他键进行查询时，考虑使用全局反向索引。

Within the rational running scope of the fan, the reverse air quantity reaches the minimum value at the maximum installation angle and highest pressure point. The coefficient of reverse air quantity at the point can be used as in index to measure the performance of reversing air.

在风机的合理工作区内，最大安装角下最高压力工况点的反风量为最小值，该点的反风量系数可以作为风机的反风量指标以衡量其反风性能。

By taking the performance rate that electric dust collector compared reverse-cellar as the assessing index of objective management, carrying out the necessary measure and arousing the enthusiasm of responsible person, could decreased the dust emission into full play.

生产实践中将电收尘器相对回转窑的运转率作为电收尘器目标管理的考核指标，落实配套措施，调动岗位人员的工作积极性，最大限度地减少出口粉尘的排放。