淘汰步骤的英文：
filtering procedures

filtering是什么意思：
n. 过滤
v. filter的现在分词；过滤

Broadband filter: A filter that transmits a range of light waves.
阔波段滤片:能让一个范围的光波透过的滤片。

Light filtered through the blinds.
光线透过了帘子。

The filter is now ready for operation.
这种滤器目前即将投入运转。

Some of this filtering is beneficial.
这种过滤有些是有益的。

Charcoal is used to filter water.
木炭是用来过滤水的。

procedures是什么意思：
n. 程序，步骤，手续，进程，礼仪

This is a reduction procedure.
这是个简化方案。

The representation of a procedure created by the invocation of that procedure.
由过程调用产生的该过程的表示。

Actions like these (with only a procedure component) are procedural actions.
这样的操作（只有一个过程部件）称为“过程操作”。

routine fire procedure
常规消防措施

The law warrants this procedure.
这一程序是法律批准的。