agree: approve,support confirm, back (vt.) , back up, buttress, strengthen, bolster, advocate
disadvantage: weaknesses, flaws, weak links, weak point, drawback, shortcoming, defect
advantage: superiority, strengths, predominance
discuss: study, analyze, deals with, is about, focuses on, concentrates on, investigates, examines(这些动词在学术里表达深入研究 而非调查）
再补充几个常用的词吧~
think：believe, argue, assert, claim, contend, insist, state, indicate, note ,remark(主张）
issue：topic, subject
连词：
However: but, yet, even so, despite that
if: provided that, unless, otherwise(接无希望看到的结果）
因果： as, since, due to, owing to(接名词)/ hence, thus, as a result, consequently，therefore
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