单词:correspondence between binary trees and forests
单词:correspondence between binary trees and forests 相关文章
Burning coal for energy adds planet-warming carbon dioxide, or CO2, to Earths atmosphere. As the planet heats up, experts warn that simply cutting greenhouse gas emissions will not be enough to avoid possibly disastrous levels of global warming. CO2
There is good and bad news about trees. The good news is there are seven times more than we thought. Scientists thought we had 400 billion trees, but we have three trillion. That's a three followed by 12 zeroes. For each person alive today, there are
There was a time before our ancestors smashed flint and steel together, 很久以前,我们的祖先还未将燧石和铁器互击, when they felt the cold lack of fire in their lives. 他们因生活缺乏火而时感寒冷。 But anthropologist
Vines Overwhelming Trees in Rain Forests Tropical rain forests in the American Hemisphere and other regions of the world are changing rapidly. Studies conducted over recent decades indicate that increasingly, most of the trees in South and Central Am
LULU GARCIA-NAVARRO, HOST: The once-green hillsides of Puerto Rico are now brown. Hurricane Maria stripped bare the lush forests of the island. While it may look depressing in the near term, NPR's John Burnett reports the forests will likely recover.
Cheryl: So, Nick, you've worked as an environmental scientist in Australia. Nick: Yeah, I have. I worked in my hometown in Tasmania, and in Tasmania, there's many environmental issues, particularly involving logging of native forests there. Cheryl: O
Now Your Turn SAMPLE DIALOG A: Most of the worlds rainforests are in danger of destruction by loggers, farmers and developers. They are disappearing at a rate of 100 acres a minute! B: What a tragedy! , Many of the worlds plant and animal species exi
Looking at a rainforest from high in the sky, you might think all the trees look about the same. 从天空高处向下看热带雨林,你可能会觉得所有的树木都是一样的。 But they are not. 但它们是不同的。 Take, for example,
This is the VOA Special English Agriculture Report. Mangroves are unusual looking trees. They have roots that stand in saltwater and look like cables or ropes laid one on top of another. Mangroves are not just pretty -- they help the environment. But
Can Forests Help Feed the World? 森林能帮着为世界提供粮食吗? Experts predict nine billion people will live on our planet by 2050. They say by that time demand for food will be two times what it is now. Officials are worried about that pr
ARI SHAPIRO, HOST: Richard Powers likes to explore big ideas in his novels. He has written about artificial intelligence, game theory, genetics, music and a lot of other things. In his latest book, The Overstory, Powers takes on trees and the lives o
Imagine you're walking through a forest. 想象你正穿行在森林中。 I'm guessing you're thinking of a collection of trees, 我猜你想的是一大片树, what we foresters call a stand, with their rugged stems and their beautiful crowns. 我们
First, we all need to get out in the forest. 首先,我们都得走出家门,走进森林。 We need to reestablish local involvement in our own forests. 我们需要重新使当地的居民融入到我们森林中去。 You see, most of our fore
Australia's vast native forests are storing three times as much carbon as previously thought and could hold the key to tackling climate change, according to a new study released Tuesday. It has found the eucalyptus forests of southeast Australia can
波黑推出庞大的植树运动 SARAJEVO, Oct. 23 (Xinhua) -- Bosnia and Herzegovina (BiH) will launch a huge campaign of planting tree on Thursday in a bid to highlight importance of forest eco-systems. The campaign, named Let's do it - A Million
Lesson 51 A Lump Of Coal 第51课 一块煤 Let us take a lump of coal in our hand. It is black in colour, and it will dirty our fingers a little, but we must not mind that. Coal is hard; but it breaks into pieces if we strike it with a hammer, and s
Voice 1 Hello and welcome to Spotlight. I'm Joshua Leo. Voice 2 And I'm Liz Waid. Spotlight uses a special English method of broadcasting. It is easier for people to understand no matter where in the world they live. Voice 1 Imagine a tree. Now, make
Voice 1 Welcome to Spotlight. I'm Liz Waid. Voice 2 And I'm Joshua Leo. Spotlight uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice 1 What do you think of when you thin