Some hunt each other.有些則是獵食彼此

each other互相；各自

They took out their resentments on each other.

他們互相發泄怨氣。

Twins look the same as each other.

雙胞胎看上去長得一樣。

And these advertise to passers-by that they are open for business.這些則在向路人宣傳它們已經開張做生意

open for business開始營業

They are open for business every day of the week.

他們這周每天都開門營業。

Sorry, not open for business yet.

對不起,尚未營業。

providing a service for countless fish on the reef,為珊瑚礁的大批魚群提供服務

provide for供給； 為 ... 作準備

They worked hard to provide for their large family.

他們努力工作以供養一大家子人。

He was quite willing to provide for them.

他完全愿意為他們提供生活費。