立彬の日本語
345--[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……
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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.
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何が起こるか知る由もない。
tbd
There is no knowing what may happen.
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それについては知る由もなかった。
tbd
She had no way to know about it.
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