单词：conic helix
圆锥螺旋线
单词：conic helix 相关文章
It would be a brilliant place for hunt together as to hides and observe the movements of these huge animals. Topographical scans have revealed the contours of this ancient landscape, features that mesolithic kind togetherness could exploit. Where the
发表于:2019-01-23 / 阅读(64) / 评论(0)
探索与发现2015年
探索与发现2015年
One of South Korea's most powerful business leaders has avoided a prison sentence for alleged corruption. A South Korean court agrees the former chairman of Samsung evaded taxes, but it threw out more serious charges. VOA's Kurt Achin reports from S
发表于:2019-02-02 / 阅读(30) / 评论(0)
VOA标准英语2008年（七月）
VOA标准英语2008年（七月）