They cite Bavarian Purity Requirements that date to Duke William IV in 1516, which allow only water, hops, and barley to be used in the brewing process.
他们以1516年威廉公爵四世公布的德国啤酒纯度条约为证，该条约规定，只有水、啤酒花、大麦可用于酿造啤酒。
1831 - William IV was crowned King of Great Britain.
1831年的今天，威廉四世加冕为大不列颠的国王。
1831 - William IV was crowned King of Great Britain.
1831年的今天，威廉四世加冕为大不列颠的国王。
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