They burst into laughter.他们突然大笑起来.Willie glared at her for a moment, then he burst into laughter.威利先是对她怒目而视, 随着也哈哈笑起来.He suddenly burst into laughter and dropped her arm.他当即哈哈大笑起来,并放开了她的臂膀....

突然大笑，放声大笑...

burst into laughter的音标：burst into laughter的英式发音音标为：[bə:st 'ɪntuː 'lɑ:ftə]burst into laughter的美式发音音标为：[bɚst 'ɪntu 'læftɚ]...