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Rock·ville AHD[rŏkʹvĭl', -vəl] D.J.[ˈrɒkˌvɪl, -vəl]K.K.[ˈrɑkˌvɪl, -vəl]NONE（无词性）- A city of central Maryland north-northwest of Washington, D.C. It is the site of several research laboratories. Population, 44,835.罗克维尔：美国马里兰州中部一城市，位于华盛顿特区西北偏北。是几个科研实验室的所在地。人口44,835
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