昆虫生命周期：完全变态

昆虫的生命周期——详细讲解完全变态。卵 → 幼虫 → 蛹 → 成虫。幼虫（毛毛虫、蛴螬、蛆）和成虫的样子完全不同。在蛹里面，昆虫的身体会重新构建。蝴蝶、甲虫、苍蝇和瓢虫都要经历完全变态。

Insect life cycles — complete metamorphosis in detail. Egg → larva → pupa → adult. The larva (caterpillar, grub, maggot) looks completely different from the adult. Inside the pupa the body is rebuilt. Butterflies, beetles, flies, and ladybirds all undergo complete metamorphosis.

学习证据 / Evidence

• 说出完全变态的四个阶段，并使用正确的术语：卵、幼虫、蛹、成虫。
• 能解释幼虫阶段是昆虫进食和成长的时期，蛹阶段是昆虫身体发生转变的时期。
• 举出至少两种会经历完全变态的昆虫，例如蝴蝶和甲虫。

• Name the four stages of complete metamorphosis using the correct terms: egg, larva, pupa, adult
• Explain that the larva stage is when the insect eats and grows, and the pupa stage is when its body transforms
• Give at least two examples of insects that undergo complete metamorphosis such as butterflies and beetles

评估问题 / Assessment

{{name}}能用正确的词语——卵、幼虫、蛹、成虫——讲解甲虫或蝴蝶的完整生命周期，并说出每个阶段会发生什么吗？

Can {{name}} explain the full life cycle of a beetle or butterfly using the proper words — egg, larva, pupa, adult — and tell you what happens at each stage?