Carotenes are insoluble in water and soluble in oils and fats.
胡萝卜素不溶于水，但溶于油和脂肪。
《柯林斯英汉双解大词典》
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Volatile oils, which give certain herbs their distinctive aroma, are not particularly soluble in water, but many plants containing them can be made into effective teas when properly prepared.
As this hot, pressurized water percolates through the grounds, it picks up emulsified oils, bubbles of carbon dioxide, water-soluble compounds and even tiny bits of coffee bean.