A flashing set of healthy and clean, regular 'pearly whites' was a rare sight in Victorian society, the preserve of the super-rich (and even then, dental hygiene was not guaranteed).

在维多利亚时代，一副闪闪发亮的健康、干净、整齐的“珍珠白”牙齿是非常罕见的，只有超级富豪才能拥有（即便如此，在那个时代，口腔卫生无法得到保证）。

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One study suggested that lamb from New Zealand, with its clean energy and rich pastures, has a lower footprint when consumed in the UK than locally produced lamb, despite the long-distance shipping.

有研究表明由于新西兰有着清洁的能源和肥沃的牧场，那里的羊卖到英国，尽管经过长途运输，碳足迹还是比英国本地羊要低。

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Clean air, clean water and rich forest and wildlife.

干净的水，丰富的森林资源以及野生动植物。

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The process captures all the best aromas and produces flavors that are exceptionally clean and rich.

FORBES: Magazine Article

China, meanwhile, says that it needs not just money but also clean technology, and accuses rich-countries of being tight-fisted with their intellectual property.

ECONOMIST: China, India and climate change

The two white grapes, Chenin Blanc and Pinot Gris, went well with almost everything the pork, the chicken, the pasta and the salmon all fit, and the wines were rich and viscous but also minerally and clean. (I tasted both domestic and imported examples of each grape.) The only sticking point was, unsurprisingly, the steak.

WSJ: Wine and Food: Pairing Without Overthinking | On Wine by Lettie Teague