そうすれば一挙両得だ。の英語

It will kill two birds with one stone.

I want both this one and that one.

That will sort things [everything, it] out.

the condition of being convenient for both sides

This line of conduct will do no harm―give no offence.

That rounds things off very nicely.

That would be convenient to both parties.

Those are very unfinished.

Those are really halfway done.

Those are really mediocre.

This sum will keep some of the duns quiet.

Either of them is [are] good enough.

This will last me for some time.

Both of those are important to me.

In practice, there is little difference between the two.

I like both of them very much.

If I do such a thing, I shall catch it

I shall get into a row.

You can have either of these, but not both.

of both things, the condition of being perfect

There's little to choose between them.

I think you're both right.

I think both of them are right.

Both of those are important to me.

Give me one, please; either will do.

It will be to your advantage―to your profit―to your interest―to do so.

This will save us a lot of trouble.

There is not much to choose between them in that respect.

If you do that, it will help you.

They are both working.