adj.优秀的；美妙的；分裂的；极快的adv.非常；极其；n.破裂；分馏；[化]裂化；v.打开( crack的现在分词)；（使…）开裂；说（笑话）；开瓶 英英释义： cracking[ 'krækiŋ ]n.a sudden sharp noise"he heard the cracking of the ice"同义词：cracksnapthe act of cracking something同义词：fracturecrackthe process whereby heavy molecules of