Nocturnal animals sleep by day and hunt by night.
夜间活动的动物白天睡觉晚上猎食。
The nocturnal animals hide in underwater caves by day, then venture out at night, feeding on small fish, squid, and octopus.
这种夜行性动物白天时隐藏在水底洞穴里，晚上才出来冒险，它们以小鱼、乌贼和章鱼为食。
许多动物在夜间猎食。
Ochkhuu helped Norvoo's father, Jaya, cut hay for eight hours, and by Sunday night they had moved enough hay to the barn to keep his animals alive through the winter, even a dzud.
奥奇古花了八个小时帮诺乌的爸爸伽雅收割干草，到周日晚上，他们已经往谷仓里搬运了足够的干草，这样即便是暴风雪过来，动物们也能有得吃。
Hair insulates animals against the sun by day as well as against the cold by night.
毛发使得动物可以在白天抵挡阳光，在夜晚抵挡严寒。
The discovery, published in the latest issue of Science, counters the traditional view that, in order to conserve energy, these animals were active only by day, leaving the night to small mammals.
这项与传统观点截然不同的发现刊登在最近一期的《科学》杂志上——传统的观点认为，为了保存能量，肉食恐龙只在白天活动，而把夜晚留给了那些小型的哺乳动物。
Light at night increases mice body mass, apparently by shifting food intake to times when the animals are less active.
夜晚的灯光会让老鼠身体发胖。当这些小动物不那么活跃时，灯光明显改变了它们的进食次数，因而造成体重增长。
The nocturnal animals hide in underwater caves by day, then venture out at night, feeding on small fish, squid , and octopus.
这种夜行性动物白天时隐藏在水底洞穴里，晚上才出来冒险，它们以小鱼、乌贼和章鱼为食。
By avoiding water holes at night, you will be less likely to frighten animals because desert dwellers are usually most active after dark.
夜里的行动应该绕开水坑，这样能避免沙漠生物，他们往往入夜后才开始活动。
Generally animals have no need to differentiate between colours because most of them hunt by night and also do not depend on colour.
一般来说动物没有必要区分颜色，因为它们大多数在夜间狩猎，也并不依赖于颜色。
The nocturnal animals hide in underwater caves by day, then venture out at night, feeding on small fish, squid, and octopus .
这种夜行性动物白天时隐藏在水底洞穴里，晚上才出来冒险，它们以小鱼、乌贼和章鱼为食。
The nocturnal animals hide in underwater caves by day, then venture out at night, feeding on small fish, squid, and octopus .
这种夜行性动物白天时隐藏在水底洞穴里，晚上才出来冒险，它们以小鱼、乌贼和章鱼为食。
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