单词：sonar optimum frequency
单词：sonar optimum frequency 相关文章
Marine Biologists and volunteers in Key Largo are working to save the survivors of a group of dolphins that beached themselves last week in the Florida Keys. Invesigators are trying to determine if sonar from a nuclear-powered submarine played a role
2009年NPR美国国家公共电台7月
It really is rocket scienceresearchers are using huge x-ray scanners from NASA to understand how sonar might be affecting the hearing of large ocean mammals. These scanners are usually used to inspect the space shuttles solid fuel rockets. Navy sonar
Scientific American(十一)月
Do you have trouble keeping up with your things? Are you constantly misplacing items and wasting your precious time hunting for them? Then the Lapa may be what you need. Lapas communicating The Lapa is a device that you attach to something you dont w
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ENVIRONMENT REPORT - November 22, 2002: Compromise on U.S. Navy Sonar By Cynthia Kirk This is the VOA Special English ENVIRONMENT REPORT. The United States Navy has agreed to temporarily limit testing
健康与环境
ENVIRONMENT REPORT – August 2, 2002: Navy Sonar and Ocean Animals By Caty Weaver This is the VOA Special English Environment Report. American officials have approved a plan for the United States Nav
健康与环境
obsession n.迷住, 困扰 obstruct v.阻隔, 阻塞, 遮断(道路、通道等) n.阻碍物, 障碍物 opt vi.选择 optimum n.最适宜 adj.最适宜的 option n.选项, 选择权, /经/买卖的特权
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