Dolphins sleep with one eye open! ……

Dolphins sleep with one eye open! ……

Dolphins sleep with one eye open! ……

Dolphins (海豚) sleep with one eye open. ……

, the best part was probably seeing the beautiful and friendly dolphins.And the luckier people among us may... captive dolphins felt about their lives.“We wanted to find out what activities in captivity they like ……

In the Amazon River (亚马逊河), there are many pink dolphins (海豚). ……

2020年9月总第71期2020年9月总第71期Smart dolphins Smart dolphins      ……

VCG  海豚“捕鱼工”，人类好帮手海豚“捕鱼工”，人类好帮手Humans and dolphins show the wonders of cooperationHumans and dolphins show the wonders of cooperation ……

可爱的海豚Many people like dolphins very much. Dolphins are mammals (哺乳动物). They live in the sea and eat.... Dolphins are very friendly and clever. They know people and help them. I like cute dolphins.江苏 ……

practiced hard every day. Lavine jumps high. He won2 the contest with a high-flying dunk. “I’m still on cloud nine,” he said. “I feel like I’m dreaming, seeing all the dunk contests and people holding3 ……

Choose the answer: 1. Which of the following about dolphins is NOT true?A. They spend most... of their brain awake while sleeping.D. They may be sleeping even when they’re swimming. 2. When dolphins ……

were very small and were lying on top of their mother.Seeing dolphins up close was also very... dolphins. They jumped beautifully in front of us. They followed us as if they were competing with us ……

dolphins and some birds are also known to have this ability. Dolphins do this to make sure they stay... that the crocodile is in fact half asleep. It’s hard to prove without actually seeing what the brain ……

Dolphins might “smile” at their friends.   TUCHONGDolphins might “smile” at their friends...). Dolphins may do this, too.We often smile to avoid (避免)misunderstandings (误解). Dolphins may do this, too ……

为什么海豚会跃出水面？Dolphins jump to breathe (呼吸) air. Compared with (与……相比) swimming, jumping carries them far by using less energy4. It is also a good way to signal (发信号) to other dolphins. ……