On a racetrack, if one car is "lapped" by another, it means the second car has driven a whole circuit further, and caught up and overtaken the first car. Thus the second car is travelling faster than the first. The rest should be fairly obvious, I think.
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vdbI don't know much about bumblebees, but I assume that a bumblebee flies at a real slow speed?Compared to a car, yes. A bumblebee is a big fat kind of bee.