Rosin sizes is a common sizing agent of paper, the content of free rosin acid is low in common rosin sizes, so the sizing effect is bad.是什么意思_Rosin sizes is a common sizing agent of paper, the content of free rosin acid is low in common rosin sizes, so the sizing effect is bad.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句