他的行为与他的同胞音乐会观众和进化阶梯下降的两个或三个梯级。
He ACTS in concert with his fellow spectators and descends two or three rungs on the evolutionary ladder.
“寄生虫”这个词总是和没用联系在一起。即使是科学家们，也曾经有过“寄生虫处在进化阶梯较底层”这种错误想法。
The very word "parasite" is associated with uselessness, and even science was once guilty of the belief that parasites were "lower" on the evolutionary ladder.
然而在进化的阶梯上取得巨大飞跃之时，我们却不知何故将一些常识和逻辑思维抛诸脑后了我们忘记了自己已经停止了超前思维。
As we climbed the steps of evolution with giant leaps, we somehow left behind common sense and logical thinking we forgot that we have stopped thinking ahead of times.
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