宇航员为太空行走做准备

（单词翻译）

    CAPE¹ 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 consecutive² 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. Unity³ module⁴ 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 cargo⁵.
    — Canting a video camera stanchion to provide clearance⁶ 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）