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英國商會（BCC）貿易政策主管威廉·貝恩（William Bain）表示，關於接下來可能發生什麼，仍有許多問題未得到解答。
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Transforms don't execute until the consumer pulls. There's no eager evaluation, no hidden buffering. Data flows on-demand from source, through transforms, to the consumer. If you stop iterating, processing stops.
France GP — May 10