That would just (about) finish me off.
そんなことをすれば身が持たない
That would never do.
((略式))それでは全然だめだ，そうなるとまったくまずい
That'll do me fine, thanks.
それでいいよ，ありがとう
That'll learn you.
これでこりるだろう
That'll teach you.
これでやっとわかったか，何回も言ったじゃないか
That's (past [ancient]) history.
それはもう昔の話だ
That's (a bit) rich(, coming from you)!
（君に言われるなんて）お笑い草だ
That's (just) the (very) thing I was looking for.
ちょうど［まさしく］探していたものだ
That's a big but.
それは大きな条件［問題点］だ
That's a bit dear.
ちょっと高いな
