【英语】英语中的连词

表因果关系或对等关系的连接词：therefore,so,as a result, as the result of…，because of, due to…,owing to,thanks to等。

(1) To ensure acceptable fits, we limit our spectroscopic sample to ...

表示推进，承接

(1) Additionally, we limited our emission-line classification sample



表示转折
Most of the papers conclude that quasars reside in regions of galaxy density that are higher than average, albeit with significant difference among various objects.

To be continued....