原因

(1)the act of causing something to happen

(2)何かが起こる原因となる行為

(3)events that provide the generative force that is the origin of something; "they are trying to determine the cause of the crash"

(4)何かの起源である発生力を提供する出来事

(1)they are trying to determine the cause of the crash

(2)彼らは衝突の原因を決定しようとしている