美国科学60秒 SSS 2012-11-09
时间：2019-01-08 作者：英语课 分类：Scientific American(十一)月
英语课
Rising seas and severe storms are the most talked-about threats of climate change, but here's another, no more coffee. Because rising temperatures may cripple wild populations of / coffee, the most cultivated species in the world. So says a study in the journal PLoS ONE.
Researchers used climate models to forecast the effects of warming on / coffee trees in Ethiopia, their native range. Under the best case of scenario 1, meaning fewer emissions 2 and less warming, only a third of today's range would still be suitable for coffee by 2080. And the worst case, wild / could be nearly wiped out in the region.
That's because coffee trees are sensitive to temperature, the researchers say, and they may not be able to colonize 3 new areas fast enough to beat climate change. That’s assuming no direct human impact, like clearing land for grazing, which is already a problem there.
Of course, the coffee in your cup doesn't come from wild trees, but wild coffee forests have a much bigger gene 4 pool than cultivated crops, meaning more resistence to disease, pest, and drought. Preserving that diversity might just be grounds to act on climate change.
n.剧本，脚本；概要
- But the birth scenario is not completely accurate.然而分娩脚本并非完全准确的。
- This is a totally different scenario.这是完全不同的剧本。
排放物( emission的名词复数 )； 散发物（尤指气体）
- Most scientists accept that climate change is linked to carbon emissions. 大多数科学家都相信气候变化与排放的含碳气体有关。
- Dangerous emissions radiate from plutonium. 危险的辐射物从钚放散出来。
v.建立殖民地，拓殖；定居，居于
- Around 700 Arabs began to colonize East Africa.公元700年阿拉伯人开始把东非变为殖民地。
- Japan used to colonize many countries in Asia.日本曾经殖民过许多亚洲国家。