Russians celebrate Cosmonaut Day on April 12, the day Soviet hero Yury Gagarin became the first man in space, in 1961.是什么意思_Russians celebrate Cosmonaut Day on April 12, the day Soviet hero Yury Gagarin became the first man in space, in 1961.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句