SSS 2011-05-05
时间：2019-01-08 作者：英语课 分类：Scientific American(五)月
This is Scientific American’s 60-Second Science. I’m Karen Hopkin. This will just take a minute.
Some things are best done after dark--setting off fireworks, telling scary stories and charging your plug-in hybrid 1 electric vehicle, because a new study shows that topping off your car battery at night generates less ozone 2. The work appears in the journal Environmental Research Letters.
Plug-in electric hybrids 3 give off less exhaust than gas guzzlers. And when they’re running on battery power, they generate no fumes 4 at all. But there’s a catch. The power plants that make the electricity you use to recharge the battery produce plumes 5 of pollution. But how much ozone gets produced depends on when you reach for that plug.
Electric power plants that burn fossil fuels release hydrocarbons 6 and nitrogen oxides. When sunlight hits those compounds, ozone forms. At night, however, well, it’s dark. And the compounds disperse 7 in large part before the sun comes up.
Scientists modeled how much ozone would be generated if the cars were charged at three different times: overnight, just before they’re driven or just after. And they found that drawing electricity from the grid 8 after-hours is best. So to drive green, plug in, lay down and get some ozone-free Zs.
Thanks for the minute. For Scientific American’s 60-Second Science, I’m Karen Hopkin.
- That is a hybrid perpetual rose.那是一株杂交的四季开花的蔷薇。
- The hybrid was tall,handsome,and intelligent.那混血儿高大、英俊、又聪明。
- The ozone layer is a protective layer around the planet Earth.臭氧层是地球的保护层。
- The capacity of ozone can adjust according of requirement.臭氧的产量可根据需要或调节。
- All these brightly coloured hybrids are so lovely in the garden. 花园里所有这些色彩鲜艳的杂交花真美丽。 来自辞典例句
- The notion that interspecific hybrids are rare is ill-founded. 有一种看法认为种间杂种是罕见的，这种看法是无根据的。 来自辞典例句
- The health of our children is being endangered by exhaust fumes. 我们孩子们的健康正受到排放出的废气的损害。
- Exhaust fumes are bad for your health. 废气对健康有害。
- The dancer wore a headdress of pink ostrich plumes. 那位舞蹈演员戴着粉色鸵鸟毛制作的头饰。
- The plumes on her bonnet barely moved as she nodded. 她点点头，那帽子的羽毛在一个劲儿颤动。
- Hydrocarbons (HC), like carbon monoxide, represent unburned and wasted fuel. 碳氢化合物(HC)像一氧化碳一样，为未燃尽的和被浪费掉的燃料。 来自英汉非文学 - 环境法 - 环境法
- With this restricted frequency range it is not applicable to hydrocarbons. 这个较紧缩的频率范围不适用于烃类。 来自辞典例句
- The cattle were swinging their tails to disperse the flies.那些牛甩动着尾巴驱赶苍蝇。
- The children disperse for the holidays.孩子们放假了。
