I think I'm talking English. 我认为我在说白话.
It's self-explanatory. 这道理显而易见. Nothing could be simpler. 再没比这更简单的了.
Didn't I make myself clear? 我还没把自己的意思说清楚吗? It's that easy! 就是那么容易!
Are you deaf or are you just playing dumb? 你聋了, 还是故意在装傻? Don't you get it? 你想不通吗?
Do I have to carve it in stone? 还要我刻在石头上你才能明白吗? Do I have to draw a picture? 非得我绘图说明你才明白吗?