... using some information of parsing re-sults. However, as the approach runs somewhat ina reverse direction to ours, we omit it from the dis-cussion. Hence, this paper will seek for the meth-ods ... sentence, f denotes a foreign sentence,and SXdenotes cumulative X-gram scores. For 3-gram scores, the tendency to separate in two clus-ters is slightly decreased. Furthermore, for 1-gramscores, ... ¯eibe the i-th word inparallel corpus (Similarly for fi,¯fi,j, and¯fi). Let|ei| be a sentence length of ei, and similarly for |fi|. We are given a pair of sentence aligned...