立彬の日本語
889--[tbd]
由， 因， 縁， よし
1. reason, significance, cause 2. piece of information that one has heard, I hear that ..., it is said that ...
原因，意义，起因；听说……，据说……
详情...           查看相关词条
彼がどこへ行ってしまったか知る由もない。
tbd
There is no way of knowing where he's gone.
[More...]
何が起こるか知る由もない。
tbd
There is no knowing what may happen.
[More...]
それについては知る由もなかった。
tbd
She had no way to know about it.
[More...]