美国科学60秒 SSS 2012-09-14
时间：2018-12-24 作者：英语课 分类：Scientific American(九)月
Plants can pull carbon dioxide, the planet warming greenhouse gas, out of earth's atmosphere. But these aren't the only living organisms that affect carbon dioxide levels and thus global warming. Nope, I'm not talking about humans. Humble 1 sea otters 3 can also reduce greenhouse gases, but indirectly 4 helping 5 Kelp plants. That finding is in the Journal Frontiers in Ecology and the Environment. Researchers used 40 years of data to look at the effect of sea otter 2 populations on Kelp. Depending on the plant density 6, one square meter of Kelp forest can absorb anywhere from tens to hundreds of grams of carbon per year. But when sea otters are around, kelp density is high and plants can suck more than twelve times as much carbon. That's because otters nosh on kelp-eating sea urchins 7. In the mammal's presence, the urchins hide away and feed on kelp detritus 8 rather than living carbon absorbing plants. So climate researchers need to note that the herbivores plants and predators 9 that eat them also have roles to play in the carbon cycle.
- In my humble opinion,he will win the election.依我拙见，他将在选举中获胜。
- Defeat and failure make people humble.挫折与失败会使人谦卑。
- The economists say the competition otter to the brink of extinction.经济学家们说，竞争把海獭推到了灭绝的边缘。
- She collared my black wool coat with otter pelts.她把我的黑呢上衣镶上了水獭领。
- An attempt is being made to entice otters back to the river. 人们正试图把水獭引诱回河里去。 来自《简明英汉词典》
- Otters are believed to have been on Earth for 90 million years. 水獭被认为存活在地球上已经9千多万年。 来自互联网
- I heard the news indirectly.这消息我是间接听来的。
- They were approached indirectly through an intermediary.通过一位中间人，他们进行了间接接触。
- The poor children regularly pony up for a second helping of my hamburger. 那些可怜的孩子们总是要求我把我的汉堡包再给他们一份。
- By doing this, they may at times be helping to restore competition. 这样一来, 他在某些时候,有助于竞争的加强。
- The population density of that country is 685 per square mile.那个国家的人口密度为每平方英里685人。
- The region has a very high population density.该地区的人口密度很高。
- Some dozen barefooted urchins ganged in from the riverside. 几十个赤足的顽童从河边成群结队而来。 来自《简明英汉词典》
- People said that he had jaundice and urchins nicknamed him "Yellow Fellow." 别人说他是黄胆病，孩子们也就叫他“黄胖”了。 来自汉英文学 - 中国现代小说