宇航员为太空行走做准备
CAPE 1 CANAVERAL — Two American astronauts will venture outside the International Space Station Monday to stow a failed coolant pump and extend the outpost's Canadian railway.
Wearing protective spacesuits in a deadly vacuum(真空) environment, Stephen Bowen and Al Drew will exit the U.S. Quest airlock at 11:18 a.m.
The spacewalk（太空漫步） will be the 154th performed since the first two station building blocks were linked in late 1998.
A late substitute for original lead spacewalker Tim Kopra, Bowen only had a month to train for the dangerous work.
"Steve brings a wealth of (spacewalking) experience," NASA flight director David Korth said Sunday. "He's a very seasoned shuttle astronaut, and he picked up quickly in (training) runs, coming up to speed on the path that we have."Kopra was injured in a mid-January bicycle accident. Bowen, who flew aboard Atlantis last May, is a veteran of five spacewalks and is the first U.S. astronaut to fly consecutive 2 missions.
PHOTO GALLERY: Discovery's final mission"He'll be just fine, and we have absolutely every confidence that we'll knock out all these tasks," Korth said.
Drew will be making his first spacewalk.
Their tasks include:
— Rigging up an electrical extension cable between the U.S. Unity 3 module 4 and the Quest airlock.
The cable routes power to airlock heaters. Adding an extension will make future maintenance work easier once Discovery's prime payload — a permanent stowage unit — is put in place on Unity's Earth-facing port.
— Moving a refrigerator-sized ammonia pump to an external stowage platform. The pump failed last August.
— Installing a new section of track for the Canadian rail car system that runs atop the station's 335-foot-long central truss and is used for moving cargo 5.
— Canting a video camera stanchion to provide clearance 6 from an external stowage platform installed Saturday.
Still to come: a decision on a proposal to do a fly-around to document the first and only time a U.S. shuttle, a Russian Soyuz space taxi and cargo carriers from Russian, Japan and Europe all are docked at the complex.
Landing at Kennedy Space Center is set for March 7.（本文由在线英语听力室整理编辑）
- I long for a trip to the Cape of Good Hope.我渴望到好望角去旅行。
- She was wearing a cape over her dress.她在外套上披着一件披肩。
- It has rained for four consecutive days.已连续下了四天雨。
- The policy of our Party is consecutive.我党的政策始终如一。
- When we speak of unity,we do not mean unprincipled peace.所谓团结，并非一团和气。
- We must strengthen our unity in the face of powerful enemies.大敌当前，我们必须加强团结。
- The centre module displays traffic guidance information.中央模块显示交通引导信息。
- Two large tanks in the service module held liquid oxygen.服务舱的两个大气瓶中装有液态氧。
- The ship has a cargo of about 200 ton.这条船大约有200吨的货物。
- A lot of people discharged the cargo from a ship.许多人从船上卸下货物。