A former empire in eastern Europe and northern Asia,powerful in 17-18th centuries under Peter the Great and Catherine the Great,overthrown by revolution in 1917.是什么意思_A former empire in eastern Europe and northern Asia,powerful in 17-18th centuries under Peter the Great and Catherine the Great,overthrown by revolution in 1917.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句