在这个主题上没有太多的争论，但是很难保证开发者不将其作为取得免费的生产实例方式。
There isn’t much debate on this topic, but ensuring that developers don’t use it as a way to get free production instances is hard.
这是利用电视作为劝导方式的一个实例。
It was an object lesson in how to use television as a means of persuasion.
安全组允许您定义其他机器访问一个实例的方式。
A security group lets you define how other machines can access an instance.
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