表示原因:(cause)
because;
because of;
as;
since;
for;
owing to;
due to;
on account of;
on the ground of;
as a result of.
表示结果:(result)
thus;
so;
consequently;
hence;
therefore;
accordingly;
as a result;
for this reason;
as a consequence;
on that account;
it follows that.