“…Based on the studies of lexical processing in the aspects of multi-word unit compositionality, lexical access and retrieve, researchers both in psycholinguistics and SLA find the following consensus, that is, (1) there exists mental lexicon (Aitchison, 1994(Aitchison, , 2010Carroll, 1999); (2) the organization pattern of mental lexicon is one of the important dimensions in lexical competence assessment (Meara, 1996;Chapelle, 1998;Wolter, 2001;Jiang, 2007); (3) lexical chunks and formulaic sequence are the two major representations of mental lexicon (Nattinger & DeCaricco, 1992;Sinclair, 1991;Lewis, 1993;Skehan, 1998;Wray, 2002;Nesselhauf, 2005;Jiang & Nekrasova, 2007;Conklin&Schmitt, 2008;Andrea, 2012;etc). What are highly controversial at present are the interlexical and intralexical organization of lexical chunks and formulaic sequences, and how they respectively help L2 learners get access to their lexical and conceptual meanings in bilingual processing.…”