bees 图片来源于网络
5.Insects are invertebrates, so they do not have backbones.
昆虫是无脊椎动物，所以它们没有脊椎。
图片来源于网络
6.They have exoskeletons.
他们有外骨骼。
7.This means they have their bones on the outside, like a shell.
这意味着它们的骨头在外面，像贝壳一样。
on the outside 在外面
图片来源于网络
8.That means them similar to crusttaceans.
这意味着它们类似于甲壳类动物。
similar to 类似于
图片来源于网络
9.Some insects, like butterflies, can change as they grow.
有些昆虫，比如蝴蝶，在成长过程中会发生变化。
as they grow 当它们成长时
