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海马在英语中称作 hippocampus。它的来源是希腊神话中的海神波塞冬的马，后来被用作生物学中的术语，指的是大脑的一部分。下面是一些英文例句：
The hippocampus is a part of the brain that is important for memory and spatial navigation.
Research has shown that damage to the hippocampus can lead to problems with memory and learning.
Some studies have suggested that certain activities, such as exercise and learning new things, can help to strengthen the hippocampus and improve memory.
来源：作文地带整理
