英语词汇“optional course”的意思、用法、释义、翻译、读音、例句、短语、词组-英汉翻译词典-复社网

单词	optional course
释义	optional course freq. 3 dict. 2 un.选修课 [网络]选修课程；公共选修课；公选
随便看	direct investments under the state budget direct inward dial direct inward dialing direct inward dialing (did) direct I/O directioal directioal contactor directioal earth-leakage relay directioal filter directioal lever directioal louver ventilation system directioal reading hardness test directioal relay directioal valve directioal valve box direct iodination direction direc-tion direction action direction action pressure controller direction aerial directional directional absorptance directional absorptivity directional accuracy

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