Almost a year ago, OPEC+ brushed aside warnings of a global supply surplus and chose to increase oil production. History seems about to repeat.
思考它，谨慎地测试这些新工具，用几周时间，而不是五分钟就做测试以强化自己原有的信念。
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"A lot of it was done with just stuff that we had," says Walker, now a company director.
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