as plain as a pikestaff 非常清楚；清清楚楚；显而易见

【例句】
My mother said of course she got it. It was as plain as a pikestaff.
我的妈妈说她当然明白，事情一清二楚的。

Don't tell me you can't see where you've painted over the frame and onto the window, it's as plain as a pikestaff.
不要告诉我你不知道你把油漆刷过了架子，而刷到了窗户上，那不是明摆着的么。