preparatory stage

基本解释

Taijiquan is like playing the "Tai Chi from power" is a preparatory stage.
好比打太极拳中的“太极起势”，是一个预备阶段。
The selection of die casting machine for employment that is very important with regard to preparatory stage for die casting production.
压铸机的选用是压铸生产的前期准备阶段之一，是技术性和经济性都很强的工作。
I think that the Korean modernization had gone through three stages: a preparatory stage, the stage that took off and the stage that went forward steadily.
韩国现代化经历了三个阶段：现代化的准备期、现代化的起飞期、现代化的稳步向前期。