cavity
cavity/ˈkæviti/n.［c］1.洞，穴，凹部：space cavity空隙There should be no air cavities in the casting.铸件内不能有气孔。2.龋洞：fill several cavities in one’s teeth补好几个牙洞［···
CD
CDabbr.光盘（compact disk缩略形式）：budget CD廉价光盘；play CD播放激光唱片She inserted a CD into the machine.她把光盘插入机器。
cease/ceaseless/ceaselessly
cease/si:s/ I.vi.&vt.停止（作vt.时可跟不定式、v-ing和普通名词）：I think, and think, and cannot cease from thinking.我想呀想，无法停下来。They ceased to trouble themselves abou···
ceiling
ceiling/ˈsi:liŋ/n.［c］天花板，顶篷，平顶：The electric light hangs from the ceiling above you.电灯从你头顶上的天花板挂下来。There are many flies on the ceiling.天花板上有许多苍蝇···
celebrate/celebration
celebrate/ˈselibreit/vt.1.庆祝：celebrate National Day (a victory)庆祝国庆(胜利) We celebrated Christmas with a tree and presents.我们用圣诞树及一些礼物庆祝圣诞节。2.歌颂，赞颂：c···
celebrity
celebrity/siˈlebriti/n.1. [u]名声：His prestige and celebrity grew.他的威望和声誉与日俱增。Social class in America was largely decided by celebrity.在美国社会阶层主要由名声决定。2···
cell
cell/sel/n.［c］1.细胞：blood(nerve, cancer) cells血液（神经，癌）细胞All animals and plants are made of cells.一切动植物都是由细胞组成的。2.小牢房；小房间：The criminal is impriso···
