If this arc voltage saltation information can be extracted, we will get the characteristic information of necking down formation.

若能从电弧电压信号中提取出拐点发生时突变的信息，则可望提取到缩颈发生的特征信息。

youdao

We had clear enough evidence about a month and a half ago that allowed us to start necking down to the point we were able to prosecute the action last night against that safe house.

NPR: Attack on Zarqawi Followed Weeks of Waiting