17.Objective To summarize the radiation hazards to crew of space flight and advancement in research of radioprotector.
目的综述国内外航天辐射危害及防护剂研究的进展,提出加强防护剂研究的建议。
18.The USNS Victorious is an unarmed ocean surveillance ship operated by a civilian mariner crew working for the Military Sealift Command.
美国海军“获胜号”是一艘由民间人士驾驶的为美国海军补给司令部工作的非武装的海洋监测。
19.The fire crew’s annual outing turned into a busman’s holiday when their bus caught fire. Fortunately, no one was hurt in the blaze.
消防队员乘坐的巴士着了火,结果他们的年度出游变成了照常工作的假日,所幸无人在火中受伤。
20.The orbiting Discovery crew on the way Sunday to rewire the International Space Station first had to make sure the shuttle's heat shield(heatshield) wasn't damaged during lift-off.