Although it is easier to build large generaldomain comparable corpora, specialized compa-rable corpora are often of modest size (around 1 million words) due to the difficulty to obtain many specialized documents in a language other than English.
word co-occurrence counts of the historical context-based projection approach, known as the standard approach (Fung, 1995;Rapp, 1995), dedicated to bilingual lexicon extraction from comparable corpora are unreliable in specialized domain.