读时请注意意群分割：大停顿// 小停顿/ bold 加重语气
Scientists know little about/ how exactly it works,// especially when it comes to complex functions复杂的功能/ like memory formation记忆的形成.// Research is more advanced in animals,/ but experiments on humans are hard.// Yet, even today,/ some parts of the brain,/ like the motor cortex 运动皮质,/ are better understood.
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