短語(yǔ)詞組短語(yǔ)secondary resizing operation 二次加工secondary tillage operation s 整地作業(yè)secondary brake operation 輔助制動(dòng)器工作secondary sizing operation 二次定型加工secondary recovery operation 二次採(cǎi)油作業(yè)stable secondary cohomology operation [數(shù)]穩(wěn)定二堦上同調(diào)運(yùn)算secondary cohomology operation 二堦上同調(diào)運(yùn)算secondary direction of operation 次要作戰(zhàn)方曏 返回 secondary operation