[yuán yīn]
cause; reason; account; master sheet
cause and effect
原因和結果
reasons for the success
成功的原因
on this account
由于這個原因
attribute it to psychic cause
將其歸之于心理上的原因
the reason lies in ...
原因在于
This collision had a very unusual cause.
這次沖突有著非同尋常的原因。
The true cause lay in the fact that he would have everything his own way.
真正的原因在于他事事要隨心所欲。