5语法术语 coordinator 与 coordination 的理解
(1)coordinating conjunction 并列连词(英文解释： A co-ordinating conjunction is a word such as 'and', 'or', or 'but' which joins two or more words, groups, or clauses of equal status, for example two main clauses.)（并列连词引导并列句or,and, but ,so）
（备注：coordinating conjunction =coordinator)
(co-词根表示共同，同等意思）
(2)subordinating conjunction从属连词 (英文解释A subordinating conjunction is a word such as 'although', 'because', or 'when' which begins a subordinate clause.）(从属连词是用来引导主从复合句:1名词性从句，2形容词性从句，3状语从句）
（备注：subordinating conjunction =subordinator n. 主从连词（如while,since,when）;（sub词根表示下一级，次要，从属意思）