“training aid”的概念、定义、翻译、参考文献-科学参考

单词	training aid
释义	training aid [`trān·iŋ ´ād] ^ENGINEERING Any item which is developed or procured primarily to assist in training and the process of learning.
随便看	tool steel tooth toothache tooth decay tooth point tooth shell top top and bottom process topaz topaz quartz top-benching top-blown rotary converter top cager top cut top dead center top-down analysis top-down design top dyeing top grafting top hamper top hooker tophus top lander top-loaded vertical antenna topmark

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