n.不定期運(yùn)輸;不定航線運(yùn)輸
動(dòng)詞tramp的現(xiàn)在分詞形式.
We went for a tramp over the hill. 我們徒步翻過(guò)了山頭
They came tramping through the kitchen leaving dirty footmarks. 他們重踏著腳步穿過(guò)廚房走來(lái),留下了骯臟的腳印。