... textbooks on English writing in Korea, however, few textbooks explain sentence punctuation in English. → There are many textbooks on English writing in Korea; however, few textbooks explain sentence ... clauses.SimpleCompoundComplexCompound-complexMain ClauseMain ClauseSubordinateClauseMain Clause + Main Clause +Main Clause +SubordinateClauseMain Clause +25 English Writing Lab http://www.hanyangowl.org ... (WSI) increased when both temperature and chlorine concentration increased.No abbreviations in subheadings3.3 Abbreviations:Don’t introduce abbreviations in subheadings8Abbreviations in body...