应该是a is to be what c is to d这是一个固定用语,在英语里是一个表修辞类比的句式意思是:A之于B正如C之于D例:Air is to human what water is to fish.
算是对【What A to B is what C to D.】的改写是【主系表】结构的句式语法上没大碍,也行的Good luck。
对啊,意思是“a对于b就像c对于d那样”
不对。is没用对应该是(a to b)is as (c to d)