单词：center line tunnel
单词：center line tunnel 相关文章
【句子对照】 I ran a marathon last week. It was so long and I was so tired. I didn't really feel like there was a light at the end of the tunnel until I saw the finish line. 我上周参加了马拉松赛跑。路程太长了，我非常地累，直到看到终点线，我才感觉有一
俚语口头禅
【句子对照】 I ran a marathon last week. It was so long and I was so tired. I didn't really feel like there was a light at the end of the tunnel until I saw the finish line. 我上周参加了马拉松赛跑。路程太长了，我非常地累，
美国常用英语俚语
By Nico Colombant and Karene Bassompierre Abidjan 06 April 2006 A micro-algae recently rediscovered by scientists is helping weak and sick people in West Africa. VOA's Nico Colombant reports from Abid
2006年VOA标准英语（四月）
For more on tonight's launch of Tiangong-1, we are joined on line by CRI's Zhang Shuangfeng from the Jiuquan Satellite Launch Center.
世界各地新闻集锦
Did you ever dream of digging a hole so deep it came out the other side of the earth? Let's play that game again, using a little physics. First we have to imagine that our tunnel is lined with super-heat-resistant material so we can pass through laye
英语时差8，16
Last time we imagined a tunnel through the center of the earth. If such a thing existed, you could step into one end, fall all the way to the other side, and step out. Gravity would cause you to pick up almost exactly as much speed on the way down as
英语时差8，16