論句之中常用到的信號詞：
　　expert , specialist , professor , associate professor [副教授]， sociologist [社會學家]
　　economist, linguist[語言學家]，consultant [顧問] psychologist [心理學家]，behaviorist [行為學家]，
　　philosopher[哲學家] , anthropologist [人類學家]，archaeologist [考古學家]
　　邏輯信號詞-路標詞
　　1，表示因果的
　　原因：后接句子 --- Because, since , as , for
　　后接詞組 --- because of , thanks to , owing to , due to , as a result of ,
　　by/in virtue of [由于]
　　* The movie touched me by virtue of its story.
　　結果： so(that), accordingly[因此]; as a result; consequently; for this
　　(that)reason; hence; therefore
　　此外：表因果的特色詞匯
　　比如A 是因，B是果：
　　A account for / be responsible for 　B
　　A　cause / lead to / result in / bring about / bring on / trigger /give rise to 　B
　　2，表示轉折的
　　“但是，然而”：but , however; yet , nevertheless, whereas
　　“盡管，雖然”：后接句子 --- although , though, even though , while ,# notwithstanding
　　后接詞組 --- despite; in spite of
　　“相反地”： conversely[相反地] ; on the contrary;
　　“另一方面”： on the other hand;
　　3，表示比較的
　　by comparison ; in contrast (相比之下); in the same way; similarly
　　4，表示遞進的
　　also; besides; furthermore; in addition; in particular(特別地)more importantly; moreover; What’s more
　　5，表示概括的
　　in brief; in conclusion; in short; in a word , in sum; to sum up; on the whole , to conclude
　　6.表示并列：
　　and , or , at the same time, meanwhile , as well as