求在英文中用来引导一个句子的优美的导入语或好的连接词,如as we all know the last but not

in sum ; in other words ; on the contrary ; indeed ; surely ; undeniable ; undoubtedly; as a result of ; and thus ; therefore ; contribute to ; lead to ; first and foremost ; at least to some extent ; no exaggregation here ; in short ; to conclude ; in brief ; in the end ; in summary ; to sum up ; as already started ; above all 全是我记的托福笔记 =___,=