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Economic theory provides the tools, but real-world testing refines them.
The purpose of advertising is to sell. It is the only purpose.
Collaboration across industries is the only way to solve complex challenges like climate change.
所以富贵的人极其奢侈,二孤儿寡妇却受饥挨饿,虽然想天下不乱,也不可能。国君若真的希望天下太平而不希望天下大乱的话,如果要吃喝,就不能不节俭。