chain是可數(shù)名詞。

These chains seem fairly solid.這些鏈子看著挺結實。The dog is fastened to post by an iron chain .那條狗用鐵索拴在柱子上了。She wore a locket hanging on a silver chain .她戴著銀項鏈兒，墜著個掛盒。I was just going out to chain up the dogs .我正打算把狗拴上。I'm chained to my desk in london .我被套在倫敦的辦公室里了。The polynucleotide chain is helical .多核苷酸鍵是螺旋形的。Her thoughts could not be chainedelsewhere .她的思想也不能被別的事物束縛住。The chain reaction is self-sustaining .連鎖反應是自持的。The dog has got free from its chain .那狗掙脫鏈子跑了。The incident sparked off a whole chain of disasters .那件事惹出了一連串的災禍。