The only evidence of pandas was their tracks in the snow...熊猫活动的唯一迹象是它们留在雪地上的足迹。Scientists believe there are about 1,600 giant pandas living in reserves in the mountains of China..科学家认为有1600只大熊猫生活在中国山区的保护区。Fewer than a t...
She became involved with political causes after the Chernobyl nuclear disaster.在切尔诺贝利核泄漏灾难发生以后，她开始投身政界。Consider Three Mile Island and the accident at Chernobyl.比如说发生在三里岛和切尔诺贝利的事件.Both Three Mile Island and Chernobyl were...