Although we tried to make the setup as real as possible, we needed to eliminate work that was both variable in time, and also variable between different customer sites.

虽然我们试图使设置尽可能接近真实环境，但是需要排除既随时间变化，又在不同站点之间不一致的工作。

youdao

Because of the limit in modern industry sites, the frequency of the process variables detect is different. We can resolve the problem by multi frequency and multi variable control.

在工业现场由于条件的限制，很多过程变量需要的检测频率并不一样，从而带来了多频多变量的控制问题。

youdao

The single strongest variable in Google rankings is the number and authority of sites that link to a posting.

FORBES: How To Make Your Blog Get Real Attention