1. vi.咆哮，轰鸣　 give a roar
2. vt. & vi.大声喊出　 say or express loudly or with force

　～ approval　大声赞成
　～ one's commands　高声下达命令
　～ one's displeasure　大声地说出他的不愉快的事
　～ oneself hoarse　喊哑嗓子
　～ an order　大声发出命令
　～ triumphantly　胜利地吼叫
　～ away overhead　（飞机）从头上轰隆隆地飞过
　～ down　用吼叫压倒（某人的）讲话声
　～ out a command　高声发布命令
　～ out a song　引吭高歌
　～ at　对…喊叫
　～ at the audience　使观众哄堂大笑
　～ into action　隆隆响着开始工作
　～ past us　轰鸣着从我们旁边驰过
　～ with laughter　纵声大笑
　～ with pain　痛苦地号叫
　～ with rage　咆哮如雷，愤怒地吼叫

　Who dares to answer back when he roars like a lion?　当他像狮子般地咆哮时，谁敢和他顶嘴?
　The injured man roared in pain.　那位受伤的人疼得大声叫喊。
　He roared with anger.　他气得大声叫起来。
　His jokes made us all roar.　他说的笑话让我们大家哄笑不止。
　The tiger roared.　老虎咆哮。
　An aircraft roared away overhead.　飞机从头上隆隆地飞过。
　Our cannon roared as the enemy ship approached.　当敌舰驶近时，我们的大炮隆隆轰击。
　Several lorries roared past.　几辆卡车轰隆隆地驶过。
　She threw more wood into the stove and soon the fire was roaring.　她又在炉子里添了些柴，火很快就呼呼地烧起来。
　He roared an order.　他大声发出命令。
　The sergeant roared his commands.　中士高声下达命令。
　He roared his displeasure.　他大声地说出他的不愉快的事。
　The delegates roared approval of the resolution.　代表们大声表示赞成这个决议。
　The river roared him to sleep.　河流的奔腾声使他入睡了。
　He roared that was a violation of the rules.　他大声吼叫说，那是违反规则的。
　He was too excited and roared himself hoarse.　他过于激动，嗓子都喊哑了。
　The crowd roared themselves hoarse.　群众叫得声音嘶哑。

 ♣ roar at　(v.+prep.)
　向…大声叫；因…大声笑　shout at sb loudly; laugh loudly
　It's a poor teacher who can only control the class by roaring at the children.　只会靠向孩子吼叫来维持秩序的老师是无能的。
　You needn't roar at me.　你不必对我大吵大嚷。
　The sergeant roared at the soldiers.　中士冲着士兵们吼叫。
　The audience roared at the pantomime.　观众被这场哑剧逗得大笑。
 ♣ roar down　(v.+adv.)
　以大声喊来压倒…的声音　drown the voice of a speaker with loud noise as by shouting
　The next speaker tried to make himself heard, but the crowd roared him down.　下一个发言者力图让人们听他讲话，但被人群的吼叫声压了下去。
 ♣ roar out　(v.+adv.)
　吼叫，表达出…　express sth loudly
　The wounded animal roared out in pain.　受伤的动物痛得直号叫。
　The baby was roaring out its hunger.　婴儿饿得直哭。
　The officer roared out a command, and all the soldiers stood to attention.　军官大吼一声发出了口令，士兵们全体立正。

 ♣ roar, bellow, bluster, clamour, vociferate
　这组词都有“连续不断或拖常地发出声音”的意思。它们的区别是：roar指人或动物为表达各种感情而发出的低沉、嘶哑、拉长的叫喊声；bellow指在空腔中的回响或从远方传来的轰鸣；bluster指风暴的咆哮，引申为声音很大但空洞、无用的叫嚷；clamour指各种声音混杂的吵闹声；vociferate指因为愤怒或激动而发出的叫喊声，尤指呼救声或抗议声。

1. roar at后接表示人的名词时，意思是“对…大声喊叫”；接表示物的名词时，作“因…大笑”解。
2. roar还可用作名词，意为“吼叫声”。例如：
　She was frightened by the roars of a lion.　她被狮子的吼叫声吓呆了。

　［同义词］ bellow, cry, shout
　［词源］古英语rarian（吼叫，怒号）