The brain is commonly called the master controller.

大脑通常被称为主控制器。

The rudimentary nerve net and nerve ring seem simple when compared to our large brain, but it's a mystery how jellyfish manage behaviours like courtship without a master controller.

与我们的大大脑相比，基本的神经网络和神经环似乎很简单，但水母如何在没有主控制器的情况下管理求爱等行为却是一个谜。