Usually when we walk through the rain forest we hear a soft sound from all the moist leaves and organic debris on the forest floor,\ says ecologist Daniel Nepstad.
出自-2013年6月阅读原文
Predictions of the collapse of the tropical rain forests have been around for years
出自-2013年6月阅读原文
Left alone, it was assumed, the world's rain forests would not only flourish but might even rescue us from disaster by absorbing the excess carbon dioxide and other planet-warming greenhouse gases.
出自-2013年6月阅读原文
Some scientists believe that the rise in carbon levels means that the Amazon and other rain forests in Asia and Africa may go from being assets in the battle against rising temperatures to liabilities
出自-2013年6月阅读原文
If the collapse of the rain forests speeds up dramatically,it could eventually release 3.5-5 billion metric tons of carbon into the atmosphere each year - making forests the leading source of greenhouse gases.
出自-2013年6月阅读原文
Some experts say that the rain forest is already at the
出自-2013年6月阅读原文
Extreme weather and reckless development arc plotting against the rain forest in ways that scientists have never seen.
出自-2013年6月阅读原文
The picture worsens with each round of El Nino, the unusually warm currents in the Pacific Ocean that drive up temperatures and invariably presage (预示) droughts and fires in the rain forest
出自-2013年6月阅读原文
More than paradise lost, a perishing rain forest could trigger a domino effect - sending winds and rains kilometers off course and loading the skies with even greater levels of greenhouse gases - that will be felt far beyond the Amazon basin.
出自-2013年6月阅读原文
organic debris echoes the sounds in a rain forest
出自-2013年6月阅读原文
In the second paragraph, the author challenges the view that the collapse of rain forests is caused by direct human interference.
出自-2013年6月阅读原文
the collapse of rain forests is caused by direct human interference
出自-2013年6月阅读原文
the condition of rain forests has been rapidly deteriorating
出自-2013年6月阅读原文
rain forests should not be converted into pastures or farms
出自-2013年6月阅读原文
The author argues that the rising carbon levels in rain forests may turn them into a major source of g
出自-2013年6月阅读原文
But towards late afternoon, rain will spread from Scotland to cover most parts by midnight.
出自-2010年6月听力原文
Ever since humanity began to farm our own food, we've faced the unpredictable rain that is both friend and enemy.
2018年6月六级真题(第一套)阅读 Section B
Food security and fortunes depend on sufficient rain, and nowhere more so than in Africa, where 96% of farmland depends on rain instead of the irrigation common in more developed places.
2018年6月六级真题(第一套)阅读 Section B
The chemical composition of rainfall changes slightly as rain clouds move.
2015年12月六级真题(第二套)听力 Section C
They were able to accurately place the hair samples in broad regions roughly corresponding to the movement of rain systems.
2015年12月六级真题(第二套)听力 Section C