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This is Scientific America's Sixty-Second-Science. I am Steve Mirsky. Got a minute? Some interesting electrical activity in the clouds of ash drifting around Europe as a result of that Icelandic volcano. Models predicted that electrical charge should
场景特点:学生介绍自己组织或者参与的一个活动。 常见套路: (1) 学生经常参加和组织的活动 班级竞选 减肥 公益活动 (2) 活动的目的:What is the main reason for the woman to participate this ac
BEIJING, March 29 (Xinhua) -- Chinese President Xi Jinping on Wednesday stressed the importance of afforestation and urged people, especially the young, to understand and protect nature via tree planting activities. Chinese PresidentXi Jinpingtalks w
今天我们要学的词是Main Street。 Main Street, 在美国,不论大城市还是小城镇,通常会有一条主街叫 Main Street. 如今说起Main Street,一般泛指普通民众、工薪阶层和小企业主的利益,相对于Wall Str