偵事一二 動機。永遠是一切的起源。 With ease，or not at all.

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Can heat, sunlight slow spread of COVID-19? Health expert weighs in WALNUT CREEK, Calif. (KGO) -- Recent laboratory studies by the U.S. Army high-level biosecurity lab suggest that heat and sunlight can potentially slow the spread of the novel coronavirus.  A study by...