survey - an examination of people's opinions or behaviour made by asking people questions, back-to-back - one happens after the other without a pause, complex - involving a lot of different but connected parts in a way that is difficult to understand, transform - to change something completely, usually to improve it, enable - to make someone able to do something, or to make something possible, commercial breaks - a short interruption of a television or radio programme to broadcast advertisements, indicate - to show, point, or make clear in another way,

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