These are your API keys. They're useful for building applications that perform tasks on MDN on your behalf. If you have stopped using any of them, or suspect one has been exposed to parties you don't trust with your account delete the key. It's easy to create a replacement key at any time.
这些是您的 API 密钥，在制作在 MDN 平台上以您的名义执行任务的应用程序时会用到。若您已经不再使用其中某个密钥，或怀疑某个密钥泄露到不可信的地方，请删除那个密钥。您随时可再创建一个新的密钥作为替代。