单词	catalytic cracker
释义	catalytic cracker noun : the unit in a petroleum refinery in which cracking is carried out in the presence of a catalyst Word History First Known Use 1947, in the meaning defined above
随便看	switched off switched on switchel switchels switcher switcher gear switcheroo switcheroos switchers switches switches off switches on switchest switchgear switchgears switchgrass switchgrasses switching switching limits switching off switching on switching yard switchings switchkeeper switchman

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