它产生粘稠的黏液并在黏液上爬行消耗了大量的能量，而一只老鼠移动同样的距离只消耗了十二分之一的能量。
It uses so much energy producing the slimy mucus and crawling over it that a mouse traveling the same distance uses only one twelfth as much energy.
这里满是蜘蛛、蝙蝠、青蛙、老鼠、恶心的虫子和其它一下爬行的昆虫。
It was full of spiders, bats, frogs, damn rats, offensive bugs and other crawling insects.
这里满是蜘蛛、蝙蝠、青蛙、老鼠、恶心的虫子和其它一下爬行的昆虫。
It was full of spiders, bats, frogs, damn rats, offensive bugs and other crawling insects.
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