in so much

never so much as

not so much A as B

so much as

so much so that

so-so

and so forth=and so on

being a second so-and-so uses

SO 2 and SO 3

so and so

SO-AND-SO

(NH 4) 2SO 3

[Os-Ⅵ(N)(NH 3) 4 ](CF 3SO 3) 3

3SO

a hundred or so

a New so cialise county

acyrthosiphon so aii(kaltenbach)

Al 2(SO 4) 3

and so