不知凡几 (不知凡幾 ) 是一个汉语成语,拼音是bù zhī fán jǐ,不知凡几是中性词。。。。
bù zhī fán jǐ
ㄅㄨˋ ㄓ ㄈㄢˊ ㄐ一ˇ
不知凡幾
不知凡几是中性词。
比比皆是
寥寥无几
can't tell how many there are (there being countless similar cases)