In each case, the system makes three guesses, with the first one being the one it thinks is most likely correct: Given those three samples, we could calculate the mean reciprocal rank as (1/3 + 1/2 + 1)/3 = 11/18 or about 0.61.
对于每个例子，系统给出三个猜测，结果中第一个是我们认为最可能正确的： 通过这三个例子，我们得到平均倒数排名为(1/3 + 1/2 + 1)/3 = 11/18大约 0.61。