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》
2
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.