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提高的是相对速度有个故事讲的是:两个朋友野外打猎,夜里露营,半夜,他们被帐篷外的熊吼惊醒,看到月光下有一只硕大无比的黑熊,一个猎手跃身穿鞋准备逃命,另一个猎手不解地问:“你穿鞋干嘛?难到你不知道黑熊跑得比你快得多吗?”“当然知道,”那个穿鞋的猎手一边系鞋带一边回答,“但我还知道我比你跑得快!”这话什么意思呢?那猎手的意思是说:我只需跑得比你快就行,那黑熊一旦追上落在后面的你,它就达到目的,把你当美餐,我可就逃之夭夭了。
The relative speed is increased There is a story about: two friends hunting in the wild, camping at night, midnight, they were awakened by bears roar outside the tent, saw a gigantic black bear in the moonlight, a hunter jumps shoes preparation Run away, another hunter puzzled to ask: “Why do you wear shoes? Hard to do you do not know the black bear ran much faster than you? ” “Of course I know, ” With the one answer, “But I also know I run faster than you!” What does this mean? That hunter means that: I just ran faster than you, that once the black bear fell behind You, it will achieve its purpose, you as a good meal, I just fled.