SUPER SCIENCE
The giant is disappearing
世界“最大生物”正在消失
In the US, there is a group of aspen trees (白杨树). There are 47,000 trees. Now the giant forest has a problem. It might disappear.
- 对本期电子报订户、有效期内的VIP教师会员和本学期小学尊享卡用户,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。