文章列表

• 1.【英语时差8,16】面包保鲜策略（上）
• Do you store your bread in the refrigerator or on the shelf? Bread stored at room temperature may grow mold sooner, but bread in the refrigerator gets...
• 2.【英语时差8,16】烤箱里的面包（上）
• Water and flour alone make a gluey mess, but with the heat of the oven, two different components of the flour exchange water molecules and in the proc...
• 3.【英语时差8,16】视觉系统，双眼视觉，和墙壁颜色（上）
• This is a psychology-of-perception demonstration you can experience in a room whose walls are all painted the same color. Look into a corner of the ro...
• 4.【英语时差8,16】旧书为什么变黄（下）
• The earliest paper, made of white cotton rags beaten by hand consisted almost entirely of long cellulose fibers. As the demand for paper increased, pa...
• 5.【英语时差8,16】旧书为什么变黄（上）
• Open an older book and you may find the paper yellowed around the edges. Even older books fall apart as you turn the pages. But you might be surprised...
• 6.【英语时差8,16】造纸的化工过程（下）
• The reason cellulose molecules in paper stick together after theyre wet is that they are made of long strings of glucose molecules one of the componen...
• 7.【英语时差8,16】造纸的化工过程（上）
• Most modern paper is made from trees, but that hasnt always been the case. In fact, paper can be made from any form of cellulose that can be broken do...
• 8.【英语时差8,16】蓝鲸是歌唱家？（下）
• Wow!That is nearly ten times greater than the difference observed in the whales. Pretty amazing, right? But, why are they such pitch perfectionists? W...
• 9.【英语时差8,16】蓝鲸是歌唱家？（上）
• Did you know that blue whales sing their songs exactly on pitch, with unbelievable accuracy? Scientists at San Francisco State University analyzed ove...
• 10.【英语时差8,16】如何找出最短路径（下）
• In the 1700s the Swiss-born mathematician, Leonhard Euler worked out a way to tell whether or not a particular design was traceable in this way simply...