The one who makes the heads of the pins must be certain of the co operation of the one who makes the points if he does not want to run the risk of producing pin heads in vain.是什么意思_The one who makes the heads of the pins must be certain of the co operation of the one who makes the points if he does not want to run the risk of producing pin heads in vain.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句