Tanabata festival legend when the dew is the Legend of Love, when the tears meet, such as the wipein the eye and in the hands of people can agile.
传说七夕节时的露水是牛郎织女相会时的眼泪，如抹在眼上和手上，可使人眼明手快。
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These habits have helped companies earn billions of dollars when customers eat snacks or wipe counters almost without thinking, often in response to a carefully designed set of daily cues.