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

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76期:家鼠(1)

Lesson 76 The Common Mouse 第76课 家鼠 This little animal likes to live near the dwellings of men, for there it finds most easily the food which it likes best to eat. Mice generally remain in their holes during the daytime. It is only the young a

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77期:百货不如皮货(1)

Lesson 77 There's Nothing Like Leather! 第77课 百货不如皮货 Every child who reads this book knows that leather is made from the skins of animals. We cannot, of course, call any piece of skin leather; it must be carefully prepared before we ca

英国学生科学读本 第77期:百货不如皮货(2)

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 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59期:美丽的蝴蝶(1)

Lesson 59 The Beautiful Butterfly 第59课 美丽的蝴蝶 What a lovely creature a butterfly is! Look at the butterflies in the picture, flying about among the blossoms. They are getting good food from the flowers, but they are doing no harm to them

英国学生科学读本 第58期:毛毛虫向前爬(2)

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

英国学生科学读本第58期:毛毛虫向前爬(1)

Lesson 58 The Creeping Caterpillar 第58课 毛毛虫向前爬 All birds lay eggs. If the eggs are kept warm, after a certain time a little bird, just like the parent birds, comes out of each egg. 鸟儿都会下蛋。如果鸟蛋能保持温暖，过一

英国学生科学读本 第57期:硫(2)

The fumes of burning sulphur will bleach straw, silk, and other things, and make them white and clean. These fumes are also useful for killing the germs which cause fevers and other diseases. 燃烧的硫磺冒出的烟，可以漂白稻草、丝绸和

英国学生科学读本 第56期:黄色的报春花(2)

One kind has in its eye a little green knob just like the head of a pin; these are called pin-eyed. The other kind has a fringe of little yellow dust-spikes instead; such flowers are called thrum-eyed. 其中一种的眼中，有一个小小的绿球，

英国学生科学读本 第56期:黄色的报春花(1)

Lesson 56 The Yellow Primrose 黄色的报春花 Spring time has come, and the April showers have brought the yellow primroses in thousands to bloom in our woods and lanes, and on our banks and meadows. 春天来了，四月的绵绵细雨，让成千上

英国学生科学读本 第55期:缝衣针和大头针(2)

But we must leave the pin, for it is the pin itself that holds the parts together. 但是必须把大头针留下，因为两块东西就是让大头针来固定的。 Pins are made of many sizes, and are either black or white in colour. They are pre

英国学生科学读本 第55期:缝衣针和大头针(1)

Lesson 55 Needles and Pins 第55课 缝衣针和大头针 Let us take a needle in your hand and look at it carefully. What do you see? There is a sharp point at one end. This makes it easy to push the needle through the cloth when you are sewing. 小朋