Surely you can see what's wrong; it's as plain as the nose on your face.

当然你能知道出了什么差错，这显而易见。

Good lord-it's as plain as the nose on your face; his girl friend has jilted him.

天哪，难道这还不清楚吗？他的女朋友把他甩了。

Opinions are divided on this matter/ issue. 60% of the students are against it, thinking that……… The reasons are as plain as the nose on your face.

在这个问题上人们的观点不同。 有60%学生反对，他们认为… 理由再清楚不过了。 一方面… ，另一方面…

He is very nervous. That is as plain as the nose on your face, because he stands awkwardly in front of the microphone for several minutes and says nothing.

很显然地，他十分紧张，因为他在麦克风前局促不安地站了好几分钟而没有说一句话。