look on… as
refer to…as
3. 区别
distinguish… from…;
separate… from…
divide… from…
tell…from…
4.就我(们)所知
As far as we know,
As is known to all,
As we all know,
As far as I’m concerned
5.重要的
critical, essential, vital, crucial, significant It is …to do sth.
6. 减少
diminish, decrease, reduce, cut down cut back on, decline, eliminate
7. 尽管
despite that,
in spite of,
although,
though
8. 关于，鉴于，由于
with regard to
in view of
with a view to
concerning
considering