Insect Life Cycle
美音、自然拼读、分级阅读与词汇复习
Introduction When you were born, your body was shaped a lot like it is now.
导言 你出生的时候 你的身体被塑造成现在的样子
It was smaller, of course, but you had a head, legs, arms, and a torso.
当然,它较小, 但你有一个头,腿,手臂,和躯干。
When you grow up, your body shape will be about the same.
长大后,身体形状会大致相同.
But some baby animals look nothing like the adults they will become.
但一些幼兽看起来并不像他们将成为的成年人.
These animals have a different kind of life cycle.
这些动物有不同的生命周期.
A life cycle is the series of changes an animal goes through during its life.
生命周期是动物在生命中经历的一系列变化.
Insects have fascinating life cycles.
昆虫有迷人的生命周期.
Some insects have a four-stage life cycle.
有些昆虫有四相的生命周期.
The insect lives as an egg, larva (LARvuh), pupa (PYOO-puh), and an adult.
昆虫以卵为生,幼虫(LARvuh),幼虫(PYOO-puh)为活生生,并有成人.
Others have a three-stage life cycle.
另一些则具有三阶段的生命周期.
The insect is born as an egg, hatches as a nymph (NIMF), and changes into an adult.
昆虫生为卵形,孵出为尼(NMF),会变为成人.
What Are Insects?
什么是昆虫吗?
There are more than 800,000 different kinds of insects.
有80多万种不同的昆虫.
They include butterflies and beetles, fleas and flies, crickets and chiggers.
它们包括蝴蝶和甲虫,跳蚤和苍蝇,板球和叮当.
Although they come in almost every shape, most insects have a few things in common.
虽然它们几乎以每一种形状出现,但大多数昆虫有一些共同点.
All insects have six legs.
所有昆虫有六条腿.
Their bodies are divided into three parts.
他们的身体分为三部分.
Most insects have wings and can fly.
大多数昆虫有翅膀并可以飞行.
Most insects also wear their skeletons outside their bodies as hard shells.
大多数昆虫还把骨架穿在身体外作硬壳.
And all insects begin as eggs.
所有昆虫都是从蛋开始的
Egg You can find insect eggs everywhere, if you know where to look.
鸡蛋 你可以到处找昆虫蛋, 如果你知道在哪里看。
Most insects lay their eggs near the food they like to eat.
大多数昆虫在自己喜欢吃的食物附近产卵.
Moths and butterflies lay eggs underneath leaves.
花蛾和蝴蝶在叶子下产卵.
Dung beetles lay eggs in balls of animal poop.
臭甲虫在动物粪便中下蛋
Many flies lay eggs on meat.
许多苍蝇在肉上下蛋.
Some insects even lay eggs on other animals.
有些昆虫甚至会给其他动物下蛋.
Many insects make special cases to protect their eggs.
许多昆虫为了保护自己的卵而特制出特例.
One insect puts foam around its eggs.
一只昆虫在蛋上放出泡沫
You may have seen this “cuckoo spit” in tall grass.
你可能已经看到高高的草地里有这种"口水"。
Many insects lay eggs in pools, ponds, or streams.
许多昆虫在池子,池塘或溪流中产卵.
Others lay their eggs underground.
其他人在地下产卵.
Rarely, a female insect keeps the eggs inside her body.
很少,雌性昆虫会把卵留在体内.
The eggs hatch, and the young are born alive.
卵出而出,而幼生而活.
Larva Most eggs hatch into a worm-like stage called a larva.
拉尔瓦 多数卵会孵出入一种叫"幼虫"的类似蠕虫的阶段.
Caterpillars, grubs, and maggots are larvae (LAR-vee).
毛毛pillar(学名:LAR-vee)为 ma科毛ots属下的一个种.
They have long bodies and many legs.
他们身体长而腿多.
Almost all larvae are eating machines.
几乎所有幼虫都在吃机器.
A larva can eat more than its own body weight in one day.
幼虫一天内能吃到比自己体重更多的东西.
Many larvae can destroy crops.
许多幼虫会破坏农作物.
Some larvae suck sap from crop roots.
一些幼虫从作物根部吸取出粪便.
Others devour the leaves.
其他人吞噬了叶子。
Others eat fruits or vegetables.
其他人吃水果或蔬菜。
Beetle larvae can weaken and kill trees.
贝壳幼虫可以削弱并杀死树木.
Some moth larvae eat wool clothing.
一些蛾子幼虫会吃羊毛服装.
On the other hand, the silkworm, a moth larva, makes silk thread.
另一方面,丝虫,一蛾幼虫会制作丝线.
Pupa Once the larva has grown, it must totally change its shape.
Pu 一旦幼虫长大,它必须彻底改变形状.
And it must protect itself while it does so.
它必须同时保护自己。
Many larvae spin cocoons out of silk or grow hard shells.
许多幼虫会从丝上自旋出出茧或会长出硬壳.
The pupa does not eat and does not move much.
普陀不吃不动多.
But inside, the insect is very busy changing shape.
但在内部,昆虫非常忙于改变形状.
This change is called metamorphosis (MET-ah-.
这种变化被称为变相(MET-ah-.
)sis-ho-FROM Adult After the metamorphosis is complete, the pupa hatches as an adult.
(sis-ho-FROM) (英语). 成人 变形完成后,被活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活活
The adult insect has wings, six legs, and three body parts.
成年昆虫有翅膀,有6条腿,并有3个身体部位.
Many larvae that lived in water will hatch into adults that live on land.
生活在水中的许多幼虫会孵化为生活在陆地上的成年人.
Larvae that lived underground will hatch above the soil.
生活在地下的拉瓦会孵化出地上
Adult insects will find mates, and the females will lay eggs.
成年昆虫会找到伴侣,雌虫会产卵.
Sometimes, this is all the adults do.
有时候,成年人只会这样
Mayfly adults live for only one day.
Mayfly成人只活了一天.
Most other insects have longer adult lives.
其他大多数昆虫的成年寿命更长.
They eat, fly, hunt, and work.
他们吃,飞,打猎,和工作。
Nymph In the three-stage life cycle, eggs do not hatch as larvae.
尼玛 在三相生命周期中,卵不会被孵出为幼虫.
They hatch as nymphs, which look like small adults.
它们孵化为尼姆斯, 看起来像小成年人。
Some nymphs do not have full wings.
有些尼姆没有完整的翅膀.
Others, such as the dragonfly nymph, may live underwater.
其它的,如" dragon"等可能生活在水下.
Nymphs do not turn into pupae.
Nymphs不会变成pupae。
Instead, they shed their skin as they grow.
相反,它们会随着生长而脱去皮肤.
Each time they shed their skin, they look more like an adult.
每次脱下皮肤,看起来都更像成人.
Slowly, the nymph transforms into an adult.
慢慢地,尼姆变了成人.