单词principal parts
na.: (动词的)主要变化形式
网络: 主要部件；主要零件；主要部分
（动词）主要部分，主要形式 （英语中有动词的不定式、过去时和过去分词）:
the forms of a verb from which all the other forms can be made. In English these are the infinitive (for exampleswim ), the past tense (swam ) and the past participle (swum ).
In the reform of the legality, the qualification of the principal parts of Chinese procuratorial organs have been oppugned.
在司法改革中，我国检察机关的法律监督主体资格受到较多的质疑。
The training teachers and adult learners are the principal parts of the curriculum development of adult higher education training.
培训教师与成人学习者是成人高等教育培训课程开发的主体；
The Brake system can be divided into two principal parts, hydraulic system and wheel Brake assemblies.
制动系统可以分为两个基本部分：液压系统和车轮制动总成。
Give the three principal parts of these irregular verbs.
说出这些不规则动词的三种主要形式。
The relationship between two principal parts of law, institute of examination and examinee, mainly embodies in their conflicts.
考试机构和考生这对特定场合下的法律主体，通常更多地表现为考试机构权力与考生权利之间的矛盾关系。
Three Principal Parts of Farm Land Resource Disposal and Comparison between Disposal Factors of the Resources of Farm Land
农地资源三大配置主体及其配置因素比较
A Study of the Ecotype in the Principal Parts of University Management
高校管理主体的生态位研究
Discussion on function of principal parts of graduate education evaluation and mutual relation
论研究生教育质量评估主体的作用及相互关系
Analysis of Corrosion Damage Characteristics for Principal Parts of Aircraft Structure
飞机结构主体材料腐蚀损伤特点分析
The double principal parts of technological innovations in dual economic formation
二元经济形态下技术创新双重主体模式的确立