)(不不)(久久)(前前)(,,)(美美)(国国)(能能)(源源)(信信)(息息)(署署)(公公)(布布)(了了)(美美)(国国)(22)(00)(22)(44)(年年)(的的)(光光)(伏伏)(发发)(电电)(新新)(增增)(装装)(机机)(目目)(标标)(,,)(在在)(公公)(布布)(目目)(标标)(时时)(,,)(美美)(国国)(能能)(源源)(信信)(息息)(署署)(还还)(特特)(别别)(提提)(到到)(,,)(要要)(实实)(现现)(今今)(年年)(的的)(目目)(标标)(,,)(难难)(度度)(极极)(大大)(。