英国学生科学读本 第59期:美丽的蝴蝶(2)

The butterfly is an insect. We see that its body is divided into three parts, and that each part is made of a number of rings joined to one another. It has three pairs of jointed legs and two pairs of wings, all of which grow out of the middle part,

英国学生科学读本 第78期:紫罗兰与三色堇(2)

This is because they grow beneath the ground, where the sun's light does not reach them. The green colour of plants is produced by the action of the sun's light. Plants grown in the dark are white and unhealthy. 这是因为它生长在阳光无法照射

英国学生科学读本 第78期:紫罗兰与三色堇(1)

Lesson 78 Violets And Pansies 第78课 紫罗兰与三色堇 How pleasant it is to stroll along the lanes in early spring-time, and to find the lovely blue or white violets hiding in the grass by the roadside! Wild pansies, too, which are of the same

英国学生科学读本 第76期:家鼠(2)

They are shaped like little chisels. 它们的形状就像凿子一样。 These cutting teeth always keep their sharp, chisel-like edge, for the front of each tooth is formed of a very hard stuff called enamel, while the rest of the tooth is made of

英国学生科学读本 第75期:蒲公英(4)

the young plants as they grew would soon choke one another. 随着幼年蒲公英逐渐长大, 它们就会限制彼此的生长空间。 Did you ever look for dandelions on a cold wet day? 你有没有在清冷的雨天看到过蒲公英? It is not

英国学生科学读本 第75期:蒲公英(3)

Lesson 75 Only A Weed 第75课 蒲公英 When the dandelion flowers have all received their supply of pollen, and their seeds are set or fully formed, 当蒲公英的花朵全部获得它们所需的花粉、种子也做好准备或者说完全成型之

英国学生科学读本 第71期:樱桃树及其果实(1)

Lesson 71 The Cherry-tree And Its Fruit 第71课 樱桃树及其果实 The cherry-tree is a small tree which grows to a height of about twenty feet. Its stem is covered with a smooth brown bark, and its green leaves have saw-like edges, somewhat like

英国学生科学读本 第74期:蒲公英(2)

In spring, some hollow flower-stalks grow up from the centre of the rosette of leaves. Each stalk bears what looks like one large yellow flower. But if you pull one of these flower-heads to pieces, you will find that it is really made up of a great m

英国学生科学读本 第61期:雪花莲(1)

Lesson 61 The Snow-drop 第61课 雪花莲 When the new year comes, the snow-drop is the first of all the flowers to put forth its lovely white blossoms. We call it the snow-drop, not only because its flowers are white as snow, but also because they

英国学生科学读本 第61期:雪花莲(2)

If you cut this seed-vessel across with a pen-knife, you will find inside it some tiny young green seeds. 用一把小刀将这个种皮切开，就能看到里面尚未成熟的绿色小种。 Within the flower of the snow-drop you can see some gree

英国学生科学读本 第35期:蒸汽往上冒(2)

There would soon be an explosion; the kettle would be burst open. It is in this way that boiler explosions are often caused. When there is too much steam in a boiler, and it cannot get out, it presses against the sides of the boiler, until at last th

英国学生科学读本 第34期:大麦(2)

Each seed of barley ends in a sort of bristle, called an awn. 每个大麦粒的末端都是一根又长又硬的毛，叫做麦芒。 Do you remember how insects help flowers to form their seeds by carrying pollen from one blossom to another? 小朋友

英国学生科学读本 第42期:调皮的麻雀(2)

In this way the sparrows do a great deal of good. If the grubs were not killed, they would eat up our garden plants, and the crops that grow in our fields. 这样, 麻雀就做了不少好事！如果麻雀不吃小虫子, 虫子就会把我们菜园里

英国学生科学读本 第41期:糖是怎么生产的(2)

The raw sugar is first dissolved in water, and is then carefully strained to make it clear. It is next boiled in large pans until the water has nearly all passed away as steam. 首先把粗糖溶解在水里, 进行严格的过滤, 把糖水滤清。然

英国学生科学读本 第46期: 一杯咖啡(2)

When the coffee-berries are ripe, they are either picked or shaken off the tree into cloths spread out below. 咖啡浆果成熟的时候, 就让工人摘下来, 或者从树上摇下来, 落到树下面铺着的布上。 The berries are then dried i

英国学生科学读本 第50期:只是一块石头(2)

Such old shells found in the rocks are called fossils. 这些从岩石中找到的古老甲壳，名叫化石。 Another kind of rock in which many fossils are found is called limestone. A drop of acid or of strong vinegar will tell you whether a sto

英国学生科学读本 第52期:苹果和苹果树(1)

Lesson 52 Apples, And The Apple-tree 第52课 苹果和苹果树 Apples, sweet apples! There never was a child who did not enjoy eating a sweet ripe apple. Did you ever see apples growing wild? If you walk through the country lanes in the month of Ma

英国学生科学读本 第33期:美丽的鸽子(2)

The wings and tail of the pigeon are covered with long feathers, called quills. The quill-feathers of the winghelp the pigeon to fly, while the quills of the tail guide the bird and steady it in its flight. 鸽子的翅膀和尾巴都覆盖着长长的

英国学生科学读本 第34期:大麦(1)

Lesson 34 Barley 第34课 大麦 I know some children who are very fond of growing seeds of all kinds in pots. Sometimes they fill a flower-pot rather more than half-full with moist sand. On the top of this damp sand they sprinkle some grains of barl

英国学生科学读本 第24期:嫩豌豆(1)

第24课 嫩豌豆 Let us go to a seed-shop and buy a few garden peas. 咱们去种子商店买点儿豌豆吧！ Here they are, looking like a handful of little grey balls. 瞧, 放在手里像一把灰色的小球。 We will soak a few of them in w