不需要多加思考就肯定地做出判斷
示例
A:William looks pale when getting out of the office.
B:As plain as the nose on your face, he was blamed for the neglect of responsibility.
A:威廉從辦公室里出來,臉色蒼白。
B:顯而易見,他因為怠忽職守被批了。
A:Linda is really promoted, how do you know?
B:It is as plain as the nose on your face. She works very hard.
A:琳達真的升職了,你怎么知道的???
B:這是很明顯的嘛,她工作那么努力。