复数:titters 现在分词:tittering 过去式:tittered
1.嗤嗤地笑,傻笑;窃笑
2.〈美〉(不懂事的)小姑娘
1.噗嗤一笑,吃吃地窃笑
1.a quiet laugh that you make because you are nervous or embarrassed
1.to laugh quietly, especially because you are nervous or embarrassed