单词：sonar position plotter
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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
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
Prosecutors in Ethiopia are seeking the death penalty for 40 people found guilty of conspiring to overthrow the government Peter Heinlein | Addis Ababa 24 November 2009 Prosecutors in Ethiopia are seeking the death penalty for 40 people found guilty
VOA标准英语2009年(十一月)
By Selah Hennessy London 04 November 2009 In this video image, Simon Mann talks to reporters in a courtroom following his pardon by the government in Malabo, Equatorial Guinea, 03 Nov 2009 A British man who was part of a failed plot to overthrow the
VOA标准英语2009年(十一月)