a 开头单词
a closed book 未揭开的秘密；高深莫测的事物
a cloud of dust 一阵尘土
a cluster of 一群；一组；一串
a cluster of flaws [医药科学]密集区缺陷
a coat of arms 盾形纹章
a coat-hanger die [化学]衣架式模具
a code of conduct 行为守则
a cognitive-pragmatic approach [语言学]认知语用研究[法学]认知语用研究
a collection of 一批，一些；收藏的；许多的；集…为一体的
a collection of illustrative plates 图谱
a comedy 一部喜剧
a comic epic-poem in prose [文学]散文体喜剧史诗
a commodity grain production base [经济学]商品粮基地
a commonplace matter 常有之事
a commonplace view 尘俗之见
a commonplace woman 庸脂俗粉
a compact minivan [新闻学与传播学]小型客货车