for some reason
这是一个固定词组------ 由于某种原因
He was late for school for some reason. 由于某种原因,他上学迟到了!
He didn't tell me the answer for some reason. 由于某种原因,他没有告诉我答案!
For some reason, i don't want to sleep. 由于某种原因,我不想睡觉!
For some reason, he cried sadly. 由于某种原因,她哭得很伤心