原文：
Engineers at the Kennedy Space Center are gearing up to start the shuttle Endeavour's countdown this evening at 8 p.m., setting the stage for launch on a space station assembly mission at 6:36:36 p.m. Wednesday. Forecasters are predicting a 70 percent chance of good weather Wednesday and Thursday, improving to 80 percent "go" on Friday. "All our systems are in very good shape right now," said NASA Test Director Steve Payne. "Countdown work is on schedule and we have no issues to report. The team is ready, Endeavour's ready and we're looking forward to Wednesday's launch and a safe and successful mission." Commander Scott Kelly, pilot Charles Hobaugh, Tracy Caldwell, Rick Mastracchio, Dave Williams, educator-astronaut Barbara Morgan and Al Drew flew to the Florida spaceport Friday. They originally hoped to take off Tuesday evening, but last week NASA managers delayed the flight one day because of time lost replacing a valve in the shuttle's crew module. Located behind the orbiter's toilet, the positive pressure relief valve failed a pressure test and engineers opted to replace it with a valve borrowed from the shuttle Atlantis. "We found a little tiny piece of debris in the sealing surface, which was causing that slight leak rate," Payne said today. "Once we removed it and retested the valve, it was tight as can be. So there's nothing wrong systemically with any of the valves. "We did borrow one from OV-104, from Atlantis, and we put it in there and we just finished a leak check, I believe early this morning, and it's very, very tight. So we're good to go as far as valves and we're not concerned about anything system wide." Shuttle weather officer Kathy Winters said she expects a 70 percent chance of good weather Wednesday, with the only concern being a chance of isolated showers and electrically active anvil clouds moving into the launch area. Two of NASA's three European emergency runways are forecast "go," as is Edwards Air Force Base in California's Mojave Desert. The outlook is much the same Thursday, still 70 percent go with less chance of anvil clouds, and by Friday, Winters said drier air is expected, prompting an 80 percent go forecast. "The weather looks good overall," Winters said. Endeavour has enough on-board liquid hydrogen and oxygen for it's three electricity producing fuel cells to make four launch attempts in five days. If the shuttle isn't off the ground by then, the team would stand down for 48 hours to top off fuel cell supplies before making additional attempts. A detailed countdown timeline, along with NASA's television schedule (revision A), a launch windows chart and the latest version of the crew's flight plan are available here.
原文来自： http://www.spaceflightnow.com/shuttle/sts118/070805csb/

With new valve tested, countdown set to begin;是由提供的阀门新闻，中文译文仅供参考(上海赛泰泵阀有限公司还生产 及电动对夹硬密封蝶阀，电动通风蝶阀，蜗轮对夹蝶阀，氧气截止阀，气动对夹硬密封蝶阀，欢迎您的选购。)
以下是参考译文：

译文：重新测试阀错误的阀门
在肯尼迪航天中心的工程师们正在整装待发，准备晚上八时开始在奋进号航天飞机的xxx今晚，设置在空间站于下午6时36分36秒组装任务周三发射阶段。经济学家们预测的百分之七十好天气周三和周四的机会，提高至百分之八十“上周五去”。 “我们所有的系统是非常良好的状态，现在，说：”美国宇航局测试主管史蒂夫佩恩。 “xxx工作正按计划进行，我们没有任何问题报告。团队准备，奋进的准备，我们期待着周三的发射和安全，成功的使命。” 指挥官斯科特凯利飞行员查尔斯Hobaugh，特蕾西考德威尔，里克马斯特拉基奥，戴夫威廉斯，教育家宇航员芭芭拉摩根和Al德鲁飞往佛罗里达州航天发射场星期五。 他们本来希望周二晚上起飞，但上周美国宇航局推迟，由于时间的飞行{yt}失去了取代航天飞机的乘员舱阀门。背后的航天飞机的厕所位于积极的泄压阀失败的压力试验和工程师们选择了用从航天飞机亚特兰蒂斯它借了阀门。 “我们发现一小片小碎片在密封面，结果造成了轻微的泄漏率，”佩恩说。 “一旦我们删除，并重新测试阀，这是紧张的，可以。所以没有关系的阀门任何错误的全身。 “我们没有借过压1 - 104，由亚特兰蒂斯，我们把在那里，我们只是完成了泄漏检查，我相信今天凌晨，它和它非常，非常紧张。所以我们好去尽可能阀门，我们还没有任何事情全系统有关。“ 航天飞机气象官员凯西温特斯说，她预计的好天气周三百分之七十的机会，而仅有的一个孤立的降雨机会，电气积极进入发射区移动铁砧云关切。美国宇航局的三个欧洲紧急跑道两个预测“走出去”，像爱德华兹空军基地位于加利福尼亚莫哈韦沙漠。 前景也是一样，2009年仍然有百分之七十到少云砧的机会，上周五，温特斯说，干燥的空气预期，促使了百分之八十的人的预测。 “天气总体看起来不错，”温特斯说。 奋进拥有足够的机载液态氢气和氧气为它的三个电力生产，使燃料电池在5天内发射了4枚尝试。如果航天飞机是不离开地面，届时，该小组将站在48小时下降到顶端起飞前作出额外的燃料电池供应的企图。 一份详细的xxx时间表，以及美国宇航局的电视节目时间表（修订版A），发射窗口图表和船员的飞行计划的{zx1}版本，可浏览这里。

更多新闻