preliminary practice and understanding 初步实践与认识
preliminary clinical practice 初步临床应用
Simple Preliminary Hearing Practice 简单初级听力练习
This paper presents an approach, using shape grammars, on the basis of shape rules to design pictures, which is a preliminary practice of solving the problems artificially.
本文提出的用形状语法，按照形状规则，设计生成图形的方法，是智能地解决这一问题的初步实践。
The thorough analysis and preliminary practice of it proves that, it can be used as the reference material for instruction classes and the teaching material for exercise classes.
深入的分析与初步的实践证明，它可作为教学课的素材与活动课的教材。
This paper introduces nanofiltration for nickel plating rinse water treatment in small-scale test, industrial practice and preliminary purification of nickel sulfate, respectively.
本文主要介绍了用纳滤膜处理电镀镍漂洗水的小试研究、工业实践及硫酸镍初步纯化研究。
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