clockwork

n [U] 1 mechanism with wheels and springs, like that of a clock （有似时钟的齿轮和发条的）机械: [attrib 作定语] a clockwork toy, ie one driven by clockwork 机械玩具 * with clockwork (ie absolute) precision 极精确 * as regular as clockwork, ie very punctual 总是非常准时. 2 (idm 习语) like `clockwork with perfect regularity and precision; smoothly 极有规律性和准确性地; 顺利地; 精确地: The operation went like clockwork. 手术进行得极为顺利.

clipboard, clipper, clipping, clique, cliquy (also cliquey, cliquish), clitoral, clitoris, Cllr, cloak, cloak-and-dagger, cloakroom, clobber, cloche, clock, clock golf, clock tower, clock-face, clock-watcher, clock-watching, clockwise, clod, clodhopper, clog, clog-dance, cloister, cloistered, clone, close, close about, close down, close in, close one's ears to, close over, close up, close with, close with sb, close-cropped (also close-cut), close-down, close-fitting, close-grained,