So he could see when a single neuron fires.

所以，他可以看到单个 神经元发出信号。

The first ones were single fires.

第一起火灾是单独发生的。

Tens of thousands of acres of rainforest, wetlands and farmland have burned, and officials say not a single fire started from natural causes.

成千上万英亩的雨林、湿地和农田被烧毁，官员们说没有一起火灾是自然原因引起的。