used to say that you think that something is probably true 很可能；大概；想必是 Presumably this is where the accident happened. 这大概就是事故现场。 🔊🔊 You'll be taking the car, presumably? 想必您是要买这辆汽车了？ 🔊🔊 I couldn't concentrate, presumably because I was so tired. 我的精神集中不起来，大概是太累了吧。 🔊🔊 Presumably you’ll be leaving the children at home. 你应该会把孩子们留在家里吧。