33 L4-All About Plants

Oxford Read and Discover level 4 All About Plants by Julie Penn

牛津阅读和发现第4级所有关于植物的朱莉佩恩

Introduction Plants are very important. We need them for food, wood, medicines, and many other things. We see plants all around us— in fields, parks, gardens, and even in our homes. What plants do you know? What plants grow in your country? Where do the plants grow? Discover! Now read and discover more about amazing plants!

植物是非常重要的。 我们需要它们提供食物、木材、药品和许多其他东西。 我们周围到处都是植物——在田野里、公园里、花园里，甚至在我们的家里。 你知道什么植物?你们国家种什么植物? 这些植物生长在哪里?发现!现在阅读和发现更多神奇的植物!

Chapter 1 Plants in Our World Plants are living things. They feed, breathe, grow, and make new plants, but they are different from animals. Plants don't move from place to place like animals do. Plants keep growing, but animals don't grow when they are older. Scientists don't know how many plants there are, but they think that there are more than 300,000 types! Many of these plants grow in rainforests. Scientists think that there are thousands more plants that we don't know about yet. There were plants on Earth more than two billion years ago! The first plants didn't grow on land— they grew in water. It took hundreds of millions of years for plants to change and to grow on land. Before plants, animals did not live on Earth. There was no oxygen in the air, and animals need to breathe oxygen. Plants produced oxygen and food for animals. They made life possible for us! Discover! Plants started to grow on land more than 400 million years ago. This is a fossil of one of the first land plants.

第一章世界上的植物植物是有生命的东西。 它们喂养、呼吸、生长和制造新的植物，但它们不同于动物。 植物不像动物那样从一个地方移动到另一个地方。 植物继续生长，但动物老了就不生长了。 科学家们不知道有多少植物，但他们认为有超过30万种!这些植物中有许多生长在雨林中。 科学家们认为还有成千上万种我们还不知道的植物。 20多亿年前地球上就有植物了!第一批植物不是在陆地上生长的，而是在水中生长的。 植物花了数亿年的时间才改变并在陆地上生长。 在植物出现之前，地球上没有动物。 空气中没有氧气，而动物需要呼吸氧气。 植物为动物提供氧气和食物。 他们让我们的生活成为可能!发现!植物在4亿多年前开始在陆地上生长。 这是最早的陆地植物之一的化石。

Chapter 2 Different Plants There are many different types of plant. Scientists put plants into different groups. They think about how plants grow and how they make new plants. Most plants make seeds. These plants are called seed plants. New plants grow from the seeds. Many seed plants produce flowers. These plants are called flowering plants. Most of the plants that you see around you are flowering plants. How many flowering plants do you know? Some seed plants produce cones, not flowers. These plants are called conifers. Some of the world's tallest trees are conifers. Discover! The biggest cones can be 40 centimeters long and they can weigh 4 kilograms! Plants that don't make seeds are called non-seed plants. Ferns and mosses are non-seed plants. They don't make seeds, but they make tiny spores. New plants grow from these spores.

第二章不同的植物有许多不同种类的植物。 科学家把植物分成不同的组。 他们思考植物是如何生长的，以及它们是如何产生新植物的。 大多数植物都有种子。这些植物被称为种子植物。 新的植物从种子中生长出来。 许多种子植物都开花。 这些植物被称为开花植物。 你周围看到的大多数植物都是开花植物。 你知道多少开花植物? 有些种子植物长球果，不开花。 这些植物叫做针叶树。 一些世界上最高的树木是针叶树。 发现!最大的球果可以有40厘米长，重达4公斤!不产生种子的植物被称为非种子植物。 蕨类植物和苔藓是没有种子的植物。 它们不会产生种子，但会产生微小的孢子。 新的植物从这些孢子中生长出来。

Chapter 3 Plant Parts A flowering plant has four main parts leaves, stems, roots, and flowers. The roots hold the plant in the soil. They take water and minerals from the soil. The leaves make food for the plant. The stems take water from the roots to the leaves. They also take food from the leaves to other parts of the plant. The stems support the plant, too. The flowers make seeds, and new plants grow from these seeds. Different vegetables come from different parts of a plant. Potatoes are from the roots of a plant. Asparagus is the stem. Cabbages are leaves. Broccoli is the flower. Food like apples and oranges are fruits. Fruits grow from flowers, and the plant's seeds are in the fruit. Discover! The biggest seeds are from the coco de mer plant. They can weigh 30 kilograms —that's about the same as a child who is ten years old!

开花植物有四个主要部分:叶、茎、根和花。 根把植物固定在土壤里。 它们从土壤中吸收水分和矿物质。 叶子为植物提供食物。 茎把水从根输送到叶。 它们也从叶子中获取食物到植物的其他部分。 茎也支撑着植物。 花产生种子，新的植物从这些种子中生长出来。 不同的蔬菜来自植物的不同部位。 土豆是一种植物的根。 芦笋是茎。卷心菜是叶子。 西兰花是花。像苹果和橘子这样的食物都是水果。 果实从花中长出来，而植物的种子就在果实中。 发现!最大的种子来自海椰树。 它们的体重可达30公斤——相当于一个10岁的孩子的体重!