YOU SAID:
they're putting that in a petri dish
INTO JAPANESE
彼らはそれをペトリ皿に入れています
BACK INTO ENGLISH
They are putting it in a petri dish
INTO JAPANESE
彼らはそれをペトリ皿に入れています
BACK INTO ENGLISH
They are putting it in a petri dish
You've done this before, haven't you.