In what follows, we will describe how to determine the proper translation among the candidate list.
as shown in Figure 2-1, we assume that the most proper translation of PY is the English word with the highest conditional probability among all leaf nodes, that is according to Bayes' law, the conditional probability is estimated by  For simplicity, we assume that a Chinese word doesn't depends on the translation context, so we can get the following approximate equation: We can also assume that the pinyin of a Chinese word is not concerned in the corresponding English translation, namely: It is almost impossible that two Chinese words correspond to the same pinyin and the same English translation, so we can suppose that: we get the approximation of (2-3) as follows:  The intelligent recommendation works on the sentence level.