单词:oxygen pressure regulator key
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(woman) Thank you. It's great to see so many of you interested in this series on Survival in Outer Space. Please excuse the cameras - we're being videotaped for the local TV stations. Tonight I'm going to talk about the most basic aspect of survival
EXPLORATIONS -April 3, 2002: Spacesuit History By Paul Thompson VOICE ONE: This is Mary Tillotson. VOICE TWO: And this is Steve Ember with the VOA Special English program EXPLORATIONS. Today we tell a
VT tidal volume 潮气容积 TLC total lung capacity 肺总量 VC vital capacity 肺活量 IC inspiratory capacity 深吸气量 ERC expiratory reserve capacity 补呼吸量 RV residual volume 残气容积 FRC functional residual capacity 功能残气量
EXPLORATIONS - The Evolution of Spacesuits STEVE EMBER: Im Steve Ember. SHIRLEY GRIFFITH: And Im Shirley Griffith with the VOA Special English program EXPLORATIONS. Today we tell about the special clothes astronauts wear that protect them while they
When U.S. President Barrack Obama visited Turkey last month, he raised the plight of a small religious school of the Greek Orthodox Church. The Halki seminary was closed by the government in 1971, and despite intense pressure by the church and diplo
By David McAlary Washington 16 May 2006 Long distance air travel can increase the risk of blood clots in the legs, a potentially fatal condition that has been known for more than half a century. Now B