听力原文： Bush administration officials yesterday lobbied Congress and tried to assure allies that a new deal to supply India with civilian nuclear technology and conventional military equipment was not meant to betray decades of nuclear-control policies or upset the regional balance of power. Indian Prime Minister Manmohan Singh, addressing Congress, said his country, which developed its nuclear program in secret in the 1970s, was a responsible nuclear state that would closely guard any future acquisitions of sensitive U. S. technology. He appealed for U.S. investment that could spur India's economic growth and bring in $150 billion in the next decade for nuclear power plants and to modernize the country's transportation system. What did Bush administration officials try to do?