Dolphins

Dolphins. Written by Emily Breich. Focus question. What is a dolphin?

《海豚》，作者：埃米莉·布雷奇 核心问题 什么是海豚？

Introduction. Dolphins live in every ocean in the world. Some even live in rivers.

简介 海豚生活在世界上的每一片海洋里 有些海豚甚至生活在河流中

Dolphins are mammals. Dolphins are mammals. They can keep their body warm. Dolphin mothers make milk for babies. They do not lay eggs. Instead, their babies are born live.

海豚是哺乳动物 海豚是哺乳动物 它们能让自己的身体保持温暖 海豚妈妈会给宝宝产奶 它们不会下蛋 相反，海豚宝宝是直接从妈妈肚子里生出来的

Dolphins breathe in air through a hole on their head. Most of the time, dolphins breathe a few times a minute. They can hold their breath for more than a minute when they need to.

海豚通过头顶的一个小孔呼吸空气 大多数时候，海豚一分钟会呼吸好几次 有需要的时候，它们能憋气超过一分钟

All about dolphins. Dolphins are different sizes. They can be big or small.

关于海豚的小知识 海豚的体型各不相同 它们有的大，有的小

Some dolphins only have four teeth. Others have more than 200 teeth. Dolphins do not use their teeth to chew. They use their teeth to grab food. Then they eat it whole.

有些海豚只有四颗牙齿 另一些海豚的牙齿超过200颗 海豚不用牙齿咀嚼食物 它们用牙齿咬住食物 然后把食物整个吞下去