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With these claws the hedgehog can burrow in the earth under the roots of trees, or in old walls; and in such places he often makes his home. 凭借这些锋利的工具, 刺猬能够在树根或老墙之下打洞穿行, 通常也都在这些地方安家
英国学生科学读本
The torn rags are then boiled in water to which lime and soda have been added. This mixture removes all grease, stains, and colouring matters. The clean white rags are next put with water into another machine, which pulls the fibres apart, tears them
英国学生科学读本
The rock called sandstone is made up of a great many grains of sand. The beating of the rain on this rock washes the grains apart, and so the hard sandstone slowly changes into loose sand. 砂岩主要由大量沙粒组成。当雨水打下来的时候
英国学生科学读本
Every day the sun's rays change thousands of tons of liquid water into water-vapour; 每天, 太阳光都能够将数千吨的液态水转化为水蒸气； and this water-vapour mingles with the air, and is carried along by the wind. 随后, 水蒸气
英国学生科学读本
Lesson 89 Clouds And Rain 第89课 云和雨 Each of us drinks about three pints of fresh water every day, and we use a great deal of water for washing, for cooking, and for other purposes. 我们每个人每一天都会饮用3品脱左右的淡水, 而
英国学生科学读本
When we change a liquid into vapour, and cool this vapour till it is liquid again, 将水加热成水蒸气, 然后对其进行冷却直至再次液化, we are said to distil the liquid, and the apparatus for doing this is called a still. 这个过程就
英国学生科学读本
Soon all the little balls of cream have their skins or coats broken, and then the tiny pieces of milk-fat inside them stick together and make a lump of yellow butter. 很快, 奶油小球的外膜破碎, 里面的乳脂颗粒则会黏在一起成为一
英国学生科学读本
The Birds House 鸟儿的家 Little bird, little bird, 小鸟，小鸟， Pray where is your house? 你的家在何方？ High up in a tree, Made of down and of moss, 在高高的树上，用绒毛和青苔筑窝， And of sticks laid across; 还有草
英国学生科学读本
The Raindrops Ride 小水滴的旅程 Some little drops of water 有些小水滴， Whose home was in the sea, 住在大海里， To go upon a journey 一天邀请去旅行， Once happened to agree. 碰巧都同意 A white cloud was their carriage; 赶
英国学生科学读本
The Cotton Tree 棉花树 Sing well fare the cotton-tree! 一起来祝愿棉花树 Bravely may it grow， 长大吧，发出勇气的光彩！ Bearing in its seeded pod 让种荚里藏身的棉朵， Cotton white as snow! 像雪花一般洁白！ Spi
英国学生科学读本
Another way of getting caterpillars is to look for them on the under sides of the leaves of such plants as the nettle, the rose, and the hawthorn. You must feed these caterpillars on the leaves of the plant on which you found them; and as they are ve
英国学生科学读本
When the tanned skins are taken out of the pits, they are well dried and rolled. After this has been done, we no longer call them skins, but leather. To finish the leather, it must be curried. This is done by rubbing into its pores as much oil and ta
英国学生科学读本
In fact, all these four plants belong to the same class. 实际上, 这四种植物同属一个种类。 If we visit the orchard again in June, we shall find that all the white flowers have fallen off the cherry-trees, and that the seed-vessel of eac
英国学生科学读本
Copper can be rolled or hammered out into thin sheets, and so we say that it is malleable. It can also be easily drawn out into wire, and for this reason we call it ductile. Sheet copper is much used for covering the bottoms of ships, and for making
英国学生科学读本
When the sheets are very thin, they are called lead-foil. A great deal of lead-foil is used in China, to line the chests in which tea is sent to Europe. 特别薄的薄片儿就叫做铅箔, 中国就是用大量的铅箔来垫在茶叶箱里, 做成铅
英国学生科学读本
The horse has small pointed ears, which it can raise or prick up and turn round when it wants to listen. Itseyes are large, and are placed so that it can see both in front and sideways without turning its head. 马的耳朵又小又尖, 可以竖起来
英国学生科学读本
Lesson 39 A Soft And Flexible MetalLead 第39课 柔韧的软金属铅 In Wales, in Derbyshire, and in the north of England, hills made of limestone are very common. In the cracks of this limestone we often find a beautiful silvery mineral called gal
英国学生科学读本
Snakes do not chew their food. They swallow their prey whole; and then they go into their holes and sleep fordays, or even weeks. 蛇吃东西不会嚼, 而是整个儿把猎物吞下去的。吞下去之后就回到洞里, 一睡就睡上几天, 甚至
英国学生科学读本
Lesson22 An ear of wheat 第22课 一棵麦穗 I am sure that you have all had some bread to eat today. How many of you know what bread is made of? The baker makes it of flour mixed with water, and some yeast, and a little salt. These things mixed to
英国学生科学读本
Lesson19 A reel of cotton 第19课 一卷棉线 Let us take some of the white cotton off this reel, and try to find out what the thread of cotton is made of. We can pull the white thread to pieces, and then we see that it is made of many short fibres
英国学生科学读本