You need to set [put] your mind to your business.
仕事に全力を傾けなくてはいけない
You needn't write to me unless there is something new.
（あまりないとは思うが）何か新しいことがない限り手紙はよこさなくて結構です（◆You needn't write to me if there isn't anything new. は「何か新...
You pays your money and you takes your choice [chance(s)].
((特に英略式))たとえうまくいかなくても決めた以上は自分の責任だ
You should next take into account the color scheme.
次には配色を考慮しなくてはならない
You'd better believe it.
〔間投詞的に〕((略式))本当に，疑いなく，きっと
You're either with me or against me.
私に賛成するか，さもなくば反対するかどちらかだ
You've got me (there).
（返答できなくて）そこなんだ
“Bob doesn't like sushi.” “No, he doesn't.”
「ボブは寿司が好きじゃない」「そう，嫌いだ」（◆質問の形式に関係なく答えの内容が否定ならnoを用いる）
“Do you have to go out now?” “I have to (go out now), and so have you (to go out).”
「もう出かけなくてはいけないの」「私はね．君もだろ」．
“Why were you there?” “Oh, no reason.”
「どうしてそこにいたの？」「ただなんとなく」
