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By David McAlary Washington 02 June 2006 The two U.S. and Russian International Space Station crewmen stepped outside the outpost for a spacewalk to perform maintenance chores as the U.S. space agency
2006年VOA标准英语（六月）
By David McAlary Washington 14 September 2006 The International Space Station has spread a new pair of golden wings. They are solar panels that will double the amount of power available to the outpost. Unfurling them took longer than expected becaus
2006年VOA标准英语（九月）
By David McAlary Washington 09 December 2006 After a two-day launch delay, the U.S. space shuttle Discovery is back in orbit, heading to a Monday rendezvous with the International Space Station. The launch from Florida was the first to take place at
2006年VOA标准英语（十二月）
By Deepak Dobhal Washington, DC 07 December 2006 watch New Space Station Astronaut When the space shuttle Discovery rockets into space on Thursday, onboard will be a new crewmember for the International Space Station -- Sunita Williams. The 41 year
2006年VOA标准英语（十二月）
Grammar Girl here. Today's topic is verbification. Last week police used a Taser on University of Florida student Andrew Meyer as they struggled to remove him from an auditorium where Senator John Kerry was speaking. The Web has been filled with deba
英语语法 Grammar Girl
拓扑排序 topological sort 偏序 partical order 拓扑有序 topological order AOV网 activity on vertex network AOE网 activity on edge network 关键路径 critical path 匹配 matching 最大匹配
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