尽可能提问多的问题是很重要的——这是一个真正的脑力激荡的锻炼，毫无疑问是一个坏的问题。
It is important to ask as many questions as possible - this is really a brainstorming exercise and no question is a bad question.
如果有问题或者有疑问需要澄清，上课过程中可随时打断我提问。
Feel free to stop me while I am lecturing if you have a question or need clarifications.
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