OpenAI Gym: Understanding `action_space` notation (spaces.Box)

题意：OpenAI Gym: 理解action_space表示法（spaces.Box）

问题背景：

I want to setup an RL agent on the OpenAI CarRacing-v0 environment, but before that I want to understand the action space. In the code on github line 119 says:

我想在OpenAI的CarRacing-v0环境上设置一个强化学习（RL）智能体，但在此之前，我想先了解动作空间。在GitHub上的代码中，第119行提到：

self.action_space = spaces.Box( np.array([-1,0,0]), np.array([+1,+1,+1]))  # steer, gas, brake

How do I read this line? Although my problem is concrete wrt