The key to their success was being disciplined enough to focus on one strategic issue at a time, rather than mixing it with a variety of other topics.

他们成功的关键是严格自律，坚持做到每次只关注一个战略性问题，而不是将各种话题囫囵地混在一起讨论。

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No complicated narratives, no personal themes, no innovations in techniques or cinematography or shots, no daring in the decisions about structure or mixing mediums, and the topics must be serious and yet usually not too divisive in their implications and conclusions.

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