An expeditionary force arrived in June 1840 to back these demands, and thus began the so-called First Opium War (1840-42).是什么意思_An expeditionary force arrived in June 1840 to back these demands, and thus began the so-called First Opium War (1840-42).在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句