“废话，”我嘟哝了一声。用英语怎么说？

“废话，”我嘟哝了一声。

'Rubbish,' I grunted...

rubbish

n. 垃圾，无意义的东西，废话，劣质的东西；vt. <英澳·非正>把…说得一钱不值，贬损…，轻视，蔑视，消灭，销毁；

例句
Residents are advised not to put their rubbish bags on the pavement outside their houses.
居民被告知不要将垃圾袋放在门外的人行道上。

grunted

v. （猪等）作呼噜声( grunt的过去式和过去分词 )，（指人）发出类似的哼声，咕哝着说；

例句
Hall greeted him jovially enough , but Gorman and Walson scowled as they grunted curt " Good Mornings. "
霍尔兴致十足地向他打招呼, 戈曼和沃森却满脸不豫之色,敷衍地咕哝句 “ 早安 ”.