(in compounds 构成复合词 a machine for recording sound or pictures or both 录音机；录像机 The cockpit voice recorder indicated that the crew did not call for any checklist. 驾驶舱录音机显示机组人员没有要求任何清单。 a tape/cassette/video/DVD recorder 磁带／盒式录音机；录像机；DVD 录像机
a musical instrument in the shape of a pipe that you blow into, with holes that you cover with your fingers 竖笛；直笛 
a judge in a court in some parts of the UK and the US （英国和美国某些地区的）刑事法院法官，法官 a person who keeps a record of events or facts 记录员；书记员 In natural history the careful observer and recorder was very important in the advance of the science. 在自然历史中，细心的观察者和记录者对科学的发展非常重要。
Word Originlate Middle English (denoting a kind of judge): from Anglo-Norman French recordour, from Old French recorder ‘bring to remembrance’; partly reinforced by the verb record (also used in the obsolete sense ‘practise a tune’: see sense (2)).