单词 fore-staff 释义 † fore-staff Naut. Obs.[f. fore- prefix + staff.]= cross-staff 2 (see quot. 1867).1669Sturmy Mariner's Mag. ii. 82 Thus I have shewed you how to take an Observation by the Fore-Staff.1719Halley in Phil. Trans. XXX. 993 The Moon was...