我看不出那个计划背后的逻辑。
I don't see the ___logic behind that plan.
如果我们运用一些逻辑,就能解决这个问题。
We'll be able to work this out if we use some ___logic.
在那上面花这么多钱毫无道理。
There's no ___logic in spending so much on that.