选择提取 meaning in English

selective extraction

To retrieve part of the guaranteed retirement payment and leave the rest to accumulate interest , or to buy annuity
可选择提取部份保证退休储备，将馀款存放于宏利积存生息，又或购买年金
Chemical analysis of zinc ores concentrates . accurate determination of zinc by complexometric titrimetry after selective extraction of zinc
锌矿石精矿的化学分析.锌选择提取后用络合滴定法进行锌的精确测定