不知出於何種原因 [ㄅㄨˋ ㄓ ㄔㄨ ㄩˊ ㄏㄜˊ ㄓㄨㄥˇ ㄩㄢˊ ㄧㄣ; bu4 zhi1 chu1 yu2 he2 zhong3 yuan2 yin1] for whatever reason ◄ ►