求翻译：有人曾做过实验，把若干个毛毛虫在花盆上摆成一个圈圈，使他们首尾相连，花盆中间放着他们的食物-松针儿，毛毛虫一个跟着一个不停的爬行，分秒不息，七天七夜，但是没有一只敢离开队伍寻找食物，最后全部因饥饿和疲劳而死亡。原来他们有个共同的习性，习惯于跟着前面的那只爬行。是什么意思？

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Some people once have done the experiment, suspends certain caterpillars on the pot a circle circle, causes their head and tail to be connected, among the pot is putting their food - pine needle, caterpillar with crawling which one does not stop, the minutes and seconds not rest, seven days seven ni

Someone has done experiments, to hold a number of caterpillars into a big circle on the pot, so that they are connected first and last, flower pots in the Middle stood their food-pine needles, the Caterpillar one by one to keep crawling, loyal, and seven days and seven nights, but no one dared to le