SCIENCE STUDY

Big blue whale has big and loud heart

作者：TEENS

蓝鲸的心跳声大得惊人！

The blue whale (蓝鲸) is the largest animal on Earth. It also has the biggest heart in the world. The whale’s heart is big and strong. It can be as heavy as 80 kg, and as big as the tire (轮胎) of a large truck.

点击阅读全文

对本期电子报订户、有效期内的VIP教师会员和本学期初一尊享卡用户，我们开放所有内容：
如果您拥有以上权限，请点这里登录；
订阅电子报，请点这里；
激活VIP教师卡，请点这里；
激活21英语尊享卡，请点这里。