David had the part sent to him, and he carried it in his jacket pocket until Pratt & Whitney engineers devised a way to keep the part from clogging oil lines.是什么意思_David had the part sent to him, and he carried it in his jacket pocket until Pratt & Whitney engineers devised a way to keep the part from clogging oil lines.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句