Since the content relatedness in the comparable corpus is basically reflected by the relations between all the possible bilingual document pairs, we use here the number of document pairs to represent the scale of the comparable corpus.
the weight β can thus be defined as the proportion of possible document pairs in the current comparable corpus (C e 1 , C f 2 ) to all the possible document pairs, which is: where # d (C) stands for the number of documents in C. this measure does not integrate the relative length of the French and English parts, which actually impacts the performance of bilingual lexicon extraction.