そうなんです

yes, that is so

なのです

なんです

it is assuredly that..., can say with confidence that...

そうだ

そうです

that is so, that is right, it looks to me, I am of the impression

七分袖

しちぶそで ななふんそで

three-quarter sleeves

そうした中で

そうしたなかで

meanwhile

出損なう

でそこなう

to fail to go, to fail to come

ですが何か

ですがなにか

what if I am..?

長袖

ながそで

long sleeves

磯撫で

いそなで

mythical shark-like demon sea monster with barbed tail fin, said to live off the coast of Matsuura and other places in Western Japan, Beach Stroker

袖なし

そでなし

sleeveless (garment)

出直す

でなおす

to come again, to call again, to make a fresh start

そんな訳で

そんなわけで

therefore, for that reason, such being the case

滄海桑田

そうかいそうでん

The word is a scene of constant changes (as the blue sea changing into a mulberry field). (Chinese legend)

桑田滄海

そうでんそうかい

The world is a scene of constant changes (as a mulberry field changing into a blue sea).

いったい何なんですか

いったいなんなんですか

what is it exactly?, what is it precisely

出来損なう

できそこなう

to be badly made, to fail

では無さそう

ではなさそう

does not seem (to be)

なしで済ます

なしですます

to do without

電解槽

でんかいそう

electrolytic cell, electrolytic bath