Orcas seen 'massaging' each other with kelp 研究人员观察到虎鲸用海带为彼此 “按摩” Episode 250728 / 28 Jul 2025 What do killer whales do with seaweed? Archaeologists pieced together Roman wall fragments to reveal 2,000 ...

If we have two things, we have to use each. If we have three or more, we can use each or every. I have a shoe on each foot. Lions have sharp claws on each or every paw. Each can be used as a pronoun, ...