reason：理由。
英汉词典的例句：
by reason of 凭…的理由，因为。 by reason (that) 因为，由于。 come to reason 清醒过来。 for a reason of state 以国家的利益为理由〔指执政者的借口〕。 for no other reason than that [but this] 单单因为(这一理由)。 for reasons of 因为。 give reasons for 说明…的理由。 have reason for [to do] 有必须的理由，有理由去(做)，…(做)是对的，…(做)是当然的。 hear reason＝listen to reason. in (all) reason 合理；正当 (It is not in reason to expect me to do so. 要我做这样的事是没有道理的。