1. C 监视器，监听器；检测器　 device used to observe, record or test sth
2. C （学校）班长；值勤生　 a pupil chosen to help the teacher in various

　electronic ～　电子监测器
　air ～　大气污染监测器
　heart ～　心脏监听器
　radio ～　无线电监测器
　radioactivity ～　放射性监测器
　TV ～　电视监视器
　video ～　电视监听器
　waveform ～　波形监视器
　connect a patient to a ～　给病人安上监测器

　Watch the monitor and tell me if the level goes above forty decibels.　看着监测器，如果超过40分贝就告诉我。
　He will make a good monitor for them.　他将成为他们的好班长。
　The whole class goes solidly against the monitor's suggestion.　全班都反对班长的建议。

1. vt.监听，监视　 (of a person or machine) watch or listen to (sth) carefully over a certain period of time for a special purpose
2. vt.监测，检测　 make continuous observation of (sth)

　～ a conversation　监听谈话
　～ the enemy planes　监视敌机
　～ the enemy's radio broadcasts　监听敌人广播
　～ the flight of a rocket　监控火箭飞行
　～ closely　严密监视

　The security police monitored all of Steve's phone calls.　秘密警察监听史蒂夫的所有电话通话。
　We monitor the enemy's radio broadcasts for political information.　我们为了收集政治情报而监听敌方的电台广播。
　This instrument monitors the patient's heartbeats.　这台仪器监听病人的心跳。
　You must monitor the latest intelligence on armaments.　你们必须密切注意有关军备的最新情报。
　He sent a doctor to monitor the patient's illness.　他派一名医生去监察病人的病情。
　You'll have to monitor your diet constantly.　你一定要经常注意控制饮食。
　They were monitoring the upper air to collect evidence of atomic explosions.　他们正在检测高空空气以收集原子爆炸的证据。
　Water flow will be monitored by computer.　水流将由计算机来监控。

　［同义词］ n. adviser, guide, recorder, screen, superior v. check, follow, keep track of, observe, record, trace
　［词源］　拉丁语monere （告诫，劝告，提醒，警告）