大脑海马区负责记忆和学习，科学家们发现体力好的孩子中的“大脑海马区”比体力不好的孩子要大12%。
The scientists found that the hippocampus, a part of the brain responsible for memory and learning, was around 12 percent larger in the fitter youngsters.
对于当时正在学习流体力学的陈和李来说，这是一个非常好的想法。
For Chen and Li, who were studying fluid mechanics at the time, this was considered to be an excellent idea.
为了节省体力，鸟儿们更喜欢顺风，它们期待着天气转好。
To conserve energy, migratory birds prefer tailwinds, and are willing to wait for good weather.
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