yòu qīng jī huì zhǔ yì / zài / lì shǐ / shàng / céng / gěi / gé mìng / zào chéng / yán zhòng / sǔn shī

右倾机会主义在历史上曾给革命造成严重损失。

Right opportunism has caused serious losses to the revolution in history.