unopposed

形容词 unopposed:

1. not having opposition or an opponent

1. The Captain says that we must draw the fire of the shore battery in order that the landing party can get to the beach unopposed.
   舰长说，为了让登陆特遣部他能顺利冲上海滩，我们必须吸引岸上的炮火来攻击我们。
2. The candidate was unopposed in the campaign.
   该候选人在竞选中未遇对手