在笼子中外来的鸟图片 Exotic birds in Cage
做一只无拘无束的狐狸在荒山野岭是饥肠辘辘，危机四伏，比做一只饱食终日的金丝雀在笼子中安然无恙得多。
Liberty is not easy, but far better to be an unfettered fox, hungry and threatened on its hill, than a well-fed canary, safe and secure in its cage.
在第二个实验中，老鼠要用饥饿来对抗恐惧。饥饿的老鼠被放在一个笼子里，笼子里有一些散发“狐狸气味”的区域和其他气味闻起来更安全的地方。
In the second experiment meant to pit the mice's hunger against their fear, hungry mice were placed in a cage that had certain "fox-scented" areas and other places that smelled safer.
在第二个实验中，老鼠要用饥饿来对抗恐惧，饥饿的老鼠被放在一个笼子里，笼子里有一些“狐狸气味”的区域和其他气味闻起来更安全的地方。
In the second experiment meant to pit the mice's hunger against their fear, hungry mice were placed in a cage that had certain "fox scented" areas and other places that smelled safer.
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