In 1918, at the invitation of Cai Yuanpei, he went to Peking University to work as an instructor at the Painting Research Society.是什么意思_In 1918, at the invitation of Cai Yuanpei, he went to Peking University to work as an instructor at the Painting Research Society.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句