the root cause 根本原因 the known cause 众所周知的原因 the theoretical reason 理论上的原因 the main reason, the main cause the possible reason/cause 可能的原因 the real cause
reason 英[ˈri:zn] 美[ˈrizən] n. 原因; 理由; 理性; 理智; vt. 推理,思考; 争辩; 辩论; 向…解释; [例句]There is a reason for every important thing that happens每件重要事情的发生都有原因。[其他] 第三人称单数:reasons 复数:reasons 现在分词:reasoning过去式:reasoned 过去分词:reasoned