The sudden onset of intense anxiety, characterized by feelings of intense fear and apprehension and accompanied by palpitations, shortness of breath, sweating, and trembling. Also called anxiety attack恐慌发作:突然产生的强烈焦虑,症状为感到强烈的害怕、恐惧并伴随心悸与短促的呼吸、出冷汗与颤抖 也作 anxiety attack