资料传送阶段,数据传输阶段, 资料转送阶段

The Great Pacific Garbage Patch may be disappearing, and not in a good way. New research presented at the biannual meeting of the American Chemical Society reveals that polystyrene actually can break down in seawater. Polystyrene is probably better k

发表于:2018-12-24 / 阅读(45) / 评论(0) 分类 Scientific American(八)月

At the Edge of the Sea The shore is an ancient world, for as long as there has been an earth and se a there has been this place of the meeting of land and water. Yet it is a world that keeps alive the sense of continuing creation and of the relentle

发表于:2018-12-31 / 阅读(103) / 评论(0) 分类 英语名著名段背诵精华

Both sides appear to be trying to find a way out of this, a way where they can save face on the one hand, but also still appear to be top of issues for the constituents on the other hand. And certainly what we've seen in the past couple of days is a

发表于:2019-01-08 / 阅读(48) / 评论(0) 分类 CNN2010年(七)月

One main goal in the renewable energy field is to find an efficient, inexpensive way to split water into hydrogen and oxygen. The hydrogen could then be used as a fuel source for vehicles or fuel cells. Typically, an electric current breaks the water

发表于:2019-01-08 / 阅读(46) / 评论(0) 分类 Scientific American(四)月

The rains are finally coming back to Kenya, but drought still persists in the central region of Isiolo South. There, many pastoralists have had to give up their way of life. It looks like a war zone. What once were emaciated, dehydrated cattle are no

发表于:2019-01-13 / 阅读(37) / 评论(0) 分类 VOA标准英语2010年(一月)

German Car Manufacturer Audi Creates Fuel From Air And Water 奥迪用空气和水合成新燃料 Creating an alternative green or carbon neutral fuel to replace gasoline has been the holy grail for scientists for many years. However, while there has

发表于:2019-02-05 / 阅读(35) / 评论(0) 分类 阅读空间