training aid教具
trainingn.训练;培养动词train的现在分词形式.
training mechanisms培养机制
training experience培训经验
Training Projectile训练弹
training literature训练用书刊
Training of farmers农民培训
Training Specialist培训专员
training arithmetic训练算法
training set quence训练符号
training psychology培训心理学
training principles训练原则