By Phuong Tran Ingkaka, Niger 10 April 2008 In countries bordering the Saharan desert, ethnic nomad Tuareg have turned their desert expertise into a money maker through tourism and smuggling. Phuong Tran recently traveled with an Algerian gasoline sm

发表于:2019-02-05 / 阅读(91) / 评论(0) 分类 VOA常速英语2008年(四月)

How Rocks Appear In Your Garden 岩石,是在地质作用下形成的矿物聚合体,其中海面下的岩石称为礁、暗礁及暗沙,由一种或多种矿物组成的,具有一定结构构造的集合体,也有少数包含有生物的遗骸

发表于:2019-02-24 / 阅读(73) / 评论(0) 分类 英语听力文摘 English Digest