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有这样一个实验:科学家把跳蚤放在桌子上,跳蚤迅速跳起,跳的高度均在其身高的100倍以上,它堪称世界上最善跳的动物。后来,科学家在跳蚤的头上放了一个玻璃罩,跳蚤每次起跳后都能触到玻璃罩。连续多次后,跳蚤终于改变了起跳高度以适应环境,而且每次跳跃总保持在罩顶以下的高度。接下来,科学家逐渐降低玻璃罩的高度,跳蚤都在碰罩后主动改变自己的起跳
There is such an experiment: the scientists put the fleas on the table, fleas jump quickly, the height of the jump are more than 100 times its height, it is the world’s best jumping animal. Later, scientists put a glass cover on the head of the flea, fleas can touch the glass cover after each take-off. After several consecutive times, the flea finally changed the height of the take-off to adapt to the environment, and each hop always remained below the top of the hoop. Next, scientists gradually reduce the height of the glass cover, the flea in the cover after the initiative to change their take-off