【評論主題】21_____ is the unity of a linguistic sequence or chain, defined in terms of its relations with its s

【評論內容】

coherence: unity of a linguistic sequence or chain, defined in terms of its relations with its surroundings.

cohesion: unity of a linguistic sequence or chain, defined in terms of its internal semantic relations.

資料來源：http://www.revue-texto.net/Reperes/Glossaires/Glossaire_en.html