短語詞組短語multiple time -keeping 多路計(jì)時time -keeping clock 單片機(jī)守時鍾manual time -keeping 秒表計(jì)時;人工計(jì)時real -time formation keeping 實(shí)時隊(duì)形保持International Association for Time -Keeping 國際計(jì)時協(xié)會 返回 time keeping