P 开头单词

pre-conditioning n.前调理

pre-conditioned conjugate-gradient approach [地球科学]预处理共轭梯度法

pre-condition n. 前提条件；先决条件

pre-comminution 预粉碎

pre-columbian art

pre-colonial adj.沦为殖民地前的；殖民地时期前的

pre-collector 前级除尘器

pre-cold-frontal squall line 锋前飑线

pre-closure operator

pre-cleaner 预净机

pre-chlorine 预氯化

pre-chlorination 预氯化

pre-cambrian period [地球科学]前寒武纪

pre-burning 预燃

pre-book v.预订；预约

pre-base 准基

pre-atomic (adj.)

pre-assessment 预评价

pre-assembly n.前部件

pre-arrangement (n.)