http:// 托福听力 TPO18 原文 Lecture4 下面就让小编来为大家介绍一下托福听力 TPO18 原文中 Lecture 4 的文本内容吧,大家要好好把握,这些都是非常有价值的材料,同时,大家也可以登录前程百利论坛进行 TPO 练习辅导,希望能够给准备托福听力的同学带来帮助。 TPO 18 Lecture 4 Biology Professor : Well, it’s finally looking like spring is arriving. The last of the winter snow would be melting away ina few days. So before we close today, I thought I’d mention a biological event that ’sa part of the transition from winter to spring, something you can go outside and watch if you have some patience. There isa small creature that lives in this area; you ’ ve probably seen it. It’s the North American wood frog. Now the wood frog ’s not that easy tosspot since it stays pretty to close to the ground, under leaves and things and it blends in really well with its background as you can see. But they are worth the effort because they do something very unusual, something you might not have even thought possible. OK North American wood frogs live over a very broad territory or range. They ’ re found all over the northeastern United States and all through Canada and Alaska, even inside the Arctic Circle. No other frog is able to live that far and north. But wherever they live, once the weather starts to turn cold and the temperature starts to drop below freezing, as soon as the frog even touches an ice crystal ora bit of frozen ground, well, it begins to freeze. Yeah...yes to me. You look a little bit tak
