Each other とanother

今回のレッツカランの旅は

Book2から

Each other　と another

です。

EACH OTHER　　　　ONE ANOTHER

I am looking ar you, and you are looking at me. We are looking at each other./ I am looking at you, you are looking at me, I am looking at him, he is looking at me etc. We are looking at one another./

We generally use "each other" for two people or things, and "one another" for more than two people or things.

気づかないうちに使っているフレーズかもしれませんね。