chug[tʃʌɡ]n.1.■[美国英语](火车头、机器等的)轧轧声,嘎嘎声vi.1.■(蒸汽机等排气时)发出嘎嘎声,发轧轧声,发噗嗤声2.■发着嘎嘎声行驶:The old ship chugged along.这条旧船嘎嘎地往前行驶。变形vi.chuggedchugging