详细解释:n. 丧钟声, 哀伤的声音, 凶兆
vt. 鸣丧钟
vi. 鸣丧钟
词型变化：
动词过去式:knelled过去分词:knelled现在分词:knelling第三人称单数:knells英语解释：
名词 knell:
the sound of a bell rung slowly to announce a death or a funeral or the end of something动词 knell:
ring as in announcing deathmake (bells) ring, often for the purposes of musical edification同义词：ring