Yeah = Yes (非规范,非正式). 同 yes 如: We’re off to France soon.’ ‘Oh yeah? When’s that?’ “我们很快就要去法国了.” “哦,是吗?什么时候去呀?” ‘I’m going to be rich one day.’ ‘Oh yeah?’(= I don’t believe you.) “总有一天我会发财的.” “哦,真的吗?”