彼らの議論はいつ終わるかわからなかった。の英語

Their argument seemed endless.

They did not have a discussion.

Their discussion ended up in a snafu.

Only after a long dispute did they come to a conclusion.

There is no telling how long their quarrel will last.

after the argument they lapsed into an unhappy silence

They were engaged in a heated argument.

An active debate was held with them.

They decided to put an end to the discussion.

I left while they were arguing.

The long discussion came to an end at last.

The discussion produced a great deal of noise, but no forward motion.

The discussion produced a great deal of noise but no forward motion.

I decided to bide my time and wait for the argument to finish.

The results of our discussion haven't come together yet.

They grew warm over the debate.

They entered into a heated discussion.

The argument has no force.

Through discussion with them, I reached this result.

They reached a negative conclusion at the end of the discussion.

Let's not argue anymore.

Let's not argue any more.

There is no telling how long their quarrel will last.

The argument will not hold.

They are having a convenient discussion.

We were arguing on different planes to the last.

However those are still being discussed.

However those are still in the middle of being discussed.

The argument lasted a long time because nobody would admit to being in the wrong.

The argument is inconsistent.