Ascending by the long white road that Tess herself had just laboured up, she saw a two-wheeledvehicle, beside which walked a man, who held up his hand to attract her attention.
A one - or two-wheeledvehicle with handles at the rear, used to convey small loads.
手推车，独轮车一种独轮或两轮的车子，把手在后部，用以运送小的货物。
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The mission also included geological experiments in the area around the volcano and testing a two-wheeledvehicle called "MARVIN, " which may be used in future Mars missions.