单词	double-head
释义	double-head verb intransitive verb : to run powered by two locomotives the train double-headed up the mountain transitive verb : to pull (a train) with two locomotives the heavy coal trains were double-headed Word History Etymology back-formation from doubleheader
随便看	focus (on) focus group focus lamp focus on focusable focused focused (on) focused on focuser focusers focuses focuses (on) focuses on focusing focusing (on) focusing cloth focusing coil focusing glass focusing on focusless focussed focusses focussing focussings FOD

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