Input neurons look at parts of the picture.

输入神经元查看图片的各个部分。

Give the neuron input and output and it can help us learn!

给神经元输入和输出，它可以帮助我们学习！

Once you have such an input, neurons become trainable, and you can train them to perform computations by exchanging messages with other neurons.

一旦有了这样的输入， 神经元就变得可训练，并且您可以训练它们通过与其他神经元交换消息来执行计算。