unilateral transaction 基本例句 单方法律行为 However, a unilateral juridical act by the intervener as a representative of the principal has no effect if the person to whom it is addressed rejects the act without undue delay.但是,如果意思表示相对方并无不当迟延地表示了拒绝,则管理人作为本人代理人所为的单方法律行为无效。