To be honest, I came here mainly on the chance of seeing you.说实话，我上这里来主要是希望能够见你一面。I'll call at her office on the chance of seeing her before she leaves.我要到她办公室去拜访，希望能在她离开前见到她。I'll call at his office on the chance of seeing him before he leaves.我要到他办公室去访问，希望能在他离开以前见到他。