Stand back to back, please.

请背对背站着。

youdao

Stand back to back and let's see who's taller.

背靠背站好，看看谁的个子高。

youdao

Stand back to back and we'll see which of you is tall.

背靠背站著，这样我们就能看出你们俩哪一个高了。

youdao

They stand back to/t?/ back.

他们背对背站着。

youdao

They stand back to/t?/ back.

他们背对背站着。

youdao