His strange habit makes sense when you consider that he's an environmental scientist who studies how to reduce litter, including things that fall off garbage trucks as they drive down the road.
他是一位研究如何减少垃圾的环境科学家，其中包括研究减少垃圾车行驶时掉下来的东西，当你考虑到这一点，自然就能明白他为什么会养成这种奇怪的习惯了。
An off-road trail leads you down a wind-blown, rocky slope to a small cave-like ledge.
一条野外小径引领你走下一个风化的岩石坡走到一个小山洞——像平台。
It has given birth to an even better off-road vehicle, the Discovery, and a luxury toy, the Range Rover.
后面生产出了性能更好的越野车——陆虎发现，及奢侈的玩具——陆虎揽胜。
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