Some hunt each other.有些则是猎食彼此

each other互相；各自

They took out their resentments on each other.

他们互相发泄怨气。

Twins look the same as each other.

双胞胎看上去长得一样。

And these advertise to passers-by that they are open for business.这些则在向路人宣传它们已经开张做生意

open for business开始营业

They are open for business every day of the week.

他们这周每天都开门营业。

Sorry, not open for business yet.

对不起,尚未营业。

providing a service for countless fish on the reef,为珊瑚礁的大批鱼群提供服务

provide for供给； 为 ... 作准备

They worked hard to provide for their large family.

他们努力工作以供养一大家子人。

He was quite willing to provide for them.

他完全愿意为他们提供生活费。