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有这么一个科学家对跳蚤做实验的故事。他们把跳蚤放在桌上,一拍桌子,跳蚤迅即跳起,高度均在其身高的100倍以上,堪称世界上跳得最高的动物。后来,科学家在跳蚤头上罩了一个玻璃罩,再拍打桌子,跳蚤跳了几次都碰到了玻璃罩,连续实验后,跳蚤改变了原来的起跳高度以适应环境。接下来,科学家逐渐地降低玻
There is such a story of scientists experimenting with fleas. They put the fleas on the table, a pound the table, fleas jump up immediately, the height of their height in more than 100 times, called the world’s highest jumping animal. Later, the scientists covered a flea head with a glass cover, and then beat the table. The flea ran across the glass several times. After a series of experiments, the flea changed its original take-off height to adapt to the environment. Next, scientists gradually reduce the glass