A study in Sweden indicated that kindergarten children who could play in a natural environment had less illness and greater physical ability than children used only to a normal playground.
瑞典的一项研究表明，能够在自然环境中玩耍的幼儿园儿童比只能在普通操场上玩耍的儿童患病更少，体能更强。
It is unnecessary to maintain in natural environment and normal situation.
当在正常的环境和情况使用时，是不需要保养的。
At the Night Safari , you can watch these animals in a more natural environment than a normal zoo.
在夜间野生动物园，你会看到这些动物比普通动物园的动物处于一个更自然化的环境。
In China the eco-environment problems are derived from the external economies and normal institutional defects and some other natural disasters.
我国生态环境问题主要是由于生产的外部不经济、正式制度安排的缺陷和各种灾害造成的。
At the Night Safari, you can watch these animals in a more natural environment than a normal zoo.
在夜晚观光，你能看比较天然的环境这些动物胜于一个正常的动物园。
At the Night Safari, you can watch these animals in a more natural environment than a normal zoo.
在夜间野生动物园，你可以看到在一个这些比正常的动物园更加自然的生活环境里的动物。
Aim: To detect behaviors of learning and memory in rats living in normal and natural environment.
目的检测模拟自然生活状态下大鼠的学习记忆行为。
Aim: To detect behaviors of learning and memory in rats living in normal and natural environment.
目的检测模拟自然生活状态下大鼠的学习记忆行为。
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