The wings of a moth may seem grey and dull to us, but to insects they may appear beautiful, showing colours which we cannot see. (Passage 3)

【参考答案】

飞蛾的翅膀在我们看来是暗灰色的，但是对于昆虫来说则看起来很漂亮，会呈现出我们看不到的颜色。