换而言之，有几种说法？

换言之:
1. viz.
2. videlicet
3. in other words
4. put it another way

Examples:
1. 换言之，有些书只需择其部分去阅读，有些书不需细读，而有少数的书则需全读，而且专心细读。
That is, some books are to be read only in parts; others to be read, but not curiously; and some few to be read wholly, and with diligence and attention.
2. 他说他没工夫去，换言之，就是他不想去。
He said he had no time to go, that is to say he do not wish to go.

总而言之: in brief

Examples:
1. 一个玩世不恭的人，一个生活放荡的家伙，总而言之，是个恶棍。
A scoffer, a debauched person, and, in brief, a man of Belial.
2. 孩子们想玩多久就玩多久，他们没有事做，也没有人会责骂他们，总而言之，他们很快乐。
The children could play as long as they liked, they had no work to do, and nobody scolded them, in short, they were happy.
3. 总而言之，这是一个妙极了的激动人心的凯尔特故事，中间穿插着一些闪烁着智慧与机智的片断。
All in all then, it is a rattling good Celtic yearn with a few fragments of wit-and-wisdom thrown in.

广而言之: speaking generally
简而言之:
1. in short
2