Small carnivoreslike foxes or raccoons or badgersare themselves prey for larger predatorslike wolves. So they spend time hiding instead of hunting. This influence that big predators have on their ecosystem is called a landscape of fear. But humans ar

发表于:2018-12-24 / 阅读(62) / 评论(0) 分类 2016年Scientific American(八)月

advent到来 conceal隐藏 disclose透露 emerge浮现 emit发出 engage 担保 flare闪光 flicker闪烁 gleam微光 glimmer闪烁 haphazard随意 inflict造成 manifest表明 novelty新鲜事物 landscape风景 lens透镜 lucid清醒 presence在场

发表于:2018-12-30 / 阅读(81) / 评论(0) 分类 80天攻克雅思核心词汇

【今日基础词】 Nature 【Transcript】 W: Mike, come and look at this painting of shrimps! It is so simple yet so vivid! M: Yeah. It is incredible! Is it the work of Qi Baishi? W: Yes, it is. How do you know that? M: Well, Qi is famous all ove

发表于:2018-12-30 / 阅读(89) / 评论(0) 分类 听基础单词练听力

ARI SHAPIRO, HOST: The poet Tess Taylor left her home in California last winter to spend this semester teaching in Northern Ireland. She says she's felt poetry come to life and is learning about the value of place. TESS TAYLOR: As our plane flew low

发表于:2019-01-17 / 阅读(47) / 评论(0) 分类 2017年NPR美国国家公共电台6月

South Africa is a country that always creates an impression. We know of its diverse population, the troubled history of apartheid and its rebirth as a global travel destination. Ive been a fan of this country for many years, but this is my chance to

发表于:2019-01-22 / 阅读(54) / 评论(0) 分类 自然百科2013年

...and may trace their ancestry all the way back to the first dogs to enter North America. The Carolina dogs are pack animals with a strick hierarchy topped by an alpha male. Like most wild dogs, they hunt in groups. But many of the kills they make a

发表于:2019-01-23 / 阅读(54) / 评论(0) 分类 探索与发现2013年

This may look like a safari through the African savanna. In fact it's a theme park in Florida. And it allows people to experience a world outside their own. In some ways, they are visiting a land from another time. 14 thousand years ago, large parts

发表于:2019-01-23 / 阅读(60) / 评论(0) 分类 探索与发现2013年

At first, the Europeans relied heavily on local food supply by native people. But as they settled in, their farming practices began to shape the landscape of North America. The plow allowed them to farm larger areas of land, helping to feed the expan

发表于:2019-01-23 / 阅读(67) / 评论(0) 分类 探索与发现2013年

Bones and Stones: Cemetery Geology A tour of Woodlawn Cemetery in the Bronx, N.Y., focuses on the geology of the landscape and the mausoleums. 参观纽约布朗克斯区的伍德劳恩公墓,他的研究重点是当地的地质景观和陵墓。

发表于:2019-02-03 / 阅读(64) / 评论(0) 分类 2018年科学美国人10月