英国学生科学读本 第67期:羊毛漫谈(2)

A single fibre of wool is very weak, but by means of a machine these fibres are twisted together to make woollen yarn, which is a strong, loose thread. This twisting together of the fibres is called spinning. The fibres are curly or wavy, and are als

英国学生科学读本 第69期:欧鲽鱼(2)

It has a short fin near the middle of each side just behind its head, and another pair of short fins between the head and the belly fin. It has also a large tail fin. 在身体每一侧头部下方靠近中间的位置上也分别有一个短鳍, 另外

英国学生科学读本 第69期:欧鲽鱼(1)

Lesson 69 The Finny Plaice 第69课 欧鲽鱼 The plaice is one of the fishes that we call flat fishes, such as the sole, the flounder, and the turbot. It is from twelve to eighteen inches long, and weighs about two or three pounds. As in all the fla

英国学生科学读本 第68期:风信子(2)

In the centre of the flower is the green seed-vessel; and if we cut this across, we shall find that it is divided into three parts, each of which contains several young seeds. 位于花朵中间的就是绿色种皮, 我们将其切开, 就会发现,

英国学生科学读本 第68期:风信子(1)

Lesson 68 The Hyacinth 第68课 风信子 The wild hyacinth is one of the most beautiful of the flowers of spring-time, and it is also one of the most abundant . In April, May, and June, we may find its flowers in many parts of the woods in such numb

英国学生科学读本 第67期:羊毛漫谈(1)

Lesson 67 A Talk About Wool 第67课 羊毛漫谈 When we take a country walk in the spring-time, we see the sheep, with its thick, warm covering of wool. But when we see it in summer, its wool is very short. In June the farmer's men wash the sheep,

英国学生科学读本 第66期:鸡蛋与小鸡(1)

Lesson 66 Eggs And Chicks 第66课 鸡蛋与小鸡 All birds lay eggs. But just as birds differ very much in size, so do their eggs. The eggs of the little humming-bird are no bigger than peas, while each egg laid by the ostrich is as big as twenty-f

英国学生科学读本 第65期:洋葱(2)

An onion can be easily pulled to pieces, for its bulb is made of a great many thick juicy leaves, all growing closely together. 我们可以轻而易举地将洋葱剥开, 分成很多片, 因为它的球茎由许多厚厚的多汁叶片构成, 彼此之

英国学生科学读本 第65期:洋葱(1)

Lesson 65 The Onion 第65课 洋葱 Onions have a very strong smell, which many people dislike; but for all that they are a very good and wholesome food. The onion is a hardy plant, and is easily grown. Let us go to a seed-shop and buy an ounce of on

英国学生科学读本 第66期:鸡蛋与小鸡(2)

The shell is made of lime, and is very brittle. If you do not often give your hens some pieces of chalk or of lime to peck, they will very likely sometimes lay eggs without any shell at all. 蛋壳是石灰质的, 非常脆。如果你喂养的母鸡无

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74期:蒲公英(1)

Lesson 74 Only A Weed 第74课 蒲公英 All through the summer, and during spring and autumn as well, our meadows and waste places are thickly dotted with the bright-yellow flowers of the common weed called the dandelion. And even throughout the win

英国学生科学读本 第73期:玻璃窗(2)

Glass is made chiefly of fine white sand or silica melted in a furnace. To make the sand melt easily, we must mix with it some soda, some chalk or lime, and a small quantity of broken glass. 玻璃主要由细致的白沙或硅石在熔炉中炼成。为

英国学生科学读本 第72期:聪明的蜘蛛(2)

Try to find a spider's web on a bush or on the grass in your garden, and look very closely at it. The spider makes the outside lines of the web first. Then it forms the lines which extend like the spokes of a wheel from the centre of the net to the e

英国学生科学读本 第72期:聪明的蜘蛛(1)

Lesson 72 The Clever Spider 第72课 聪明的蜘蛛 You may have seen men setting nets in the sea, or in a river, to catch fish. Let me tell you about the little animals that are always setting nets in your house and in your garden in much the same

英国学生科学读本 第71期:樱桃树及其果实(2)

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 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70期:蒸发作用(2)

The finger which is wet with alcohol will be dry before you can count ten, while the finger which is wet with water may take a minute or more to dry. 在你数到十之前, 那根沾有酒精的手指就会变得干燥, 而另外一根沾有水的手指

英国学生科学读本 第70期:蒸发作用(1)

Lesson 70 Evaporation 第70课 蒸发作用 Let us fill a small kettle with water, and place it on the fire. The water will soon begin to boil. After an hour or so we shall find the kettle quite empty, although no one has touched it since it was plac

英国学生科学读本 第73期:玻璃窗(1)

Lesson 73 A Pane Of Glass 第73课 玻璃窗 If you had lived in Britain a thousand years ago, you might have seen panes of glass in the churches, but you would have found very few glass windows in the houses of the people. The windows in those days