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Results are then compared to the Canadian drinking water quality guidelines to decide whether or not the water is safe to drink , or to swim in . If guidelines are violated , the ads are then pulled during the checking process . These entries are then cataloged by the system , which enables callers to place calls using voice commands ; the system 's voice recognition system has settings for English , Spanish , and Canadian French. Text-to-voice technology also means that the system will read aloud incoming text messages as they arrive . The resulting orders are then processed to purchasing , manufacturing and fulfillment . These signals are then used to trigger activity in the paralyzed muscles .