目的关系:
with this object;for this purpose;in order that;in this way, since;so
that; on that account;in case;with a view to;for the same reason.
重申关系:
in other words;that is to say;as I have said; again;once again.
结果关系:
accordingly;thus;consequently;hence;therefore;thereupon;inevitably;
under these conditions;as a result;as a consequence;because;because of; so
that;not only...but (also...);so... as to.