核心词议：
n. 喇叭，扬声器；扩音器
loudspeaker 基本解释
n. 扩音器，扬声器；喇叭；扬场器
速记方法
速记技巧 词源词根法 比喻用法。loud响亮的+speak说话+-er名词词尾
知识扩展
loudspeaker 变化形式
复数： loudspeakers
中文词源： loudspeaker 扩音器，喇叭 比喻用法。 loudspeaker
精选例句
1、 Their names were called over the loudspeaker.
喇叭里叫着他们的名字。
2、 I distinctly heard the loudspeaker calling passengers for the Washington-Miami flight.
我清楚地听到扩音器在呼叫由华盛顿飞往迈阿密的旅客。
常见考点例句：
- It is that you can use a loudspeaker to talk to potential targets before deciding whether to attack them .
- 那就是在决定是否攻击一个目标之前，你可以用扩音器对可能的目标进行喊话。
- Not so the acts of vietnam 's red demons , with their nauseating loudspeaker jingles about happiness and light .
- 不像越南红色恶魔们的行径，这里总是能听到人们拿着令人恶心的扩音器到处宣传幸福和光明。
- At the office , I find myself increasingly irritated by the loudspeaker that bellows a pre-recorded and irrelevant security announcement whenever I lock my bicycle to the bike racks .
- 在办公室，我发现我越来越受不了那个扩音器，每次我把自行车锁到自行车架上时，这个扩音器就会发出预先录制好的、无关痛痒的安全告示。
- The associated press news agency reported that an official who tried to read the statement over a loudspeaker to protesters was drowned out by calls for the mayor to step down .
- 据美联社（associatedpress）记者报道，一名官员试图通过扩音器宣读声明，但声音很快淹没于要求市长下台的呼喊声中。
- That will send word to local municipalities , which will alert residents by radio or loudspeaker .
- 该系统将向地方各市发出消息，各市通过电台和喇叭向居民发出预警。
