"She walks most gracefully" might be a synonym for "She walks extremely gracefully". But "she walks most gracefully" may be utilized to mean "she walks by far the most gracefully". So, the Variation with no "the" carries both meanings (or sets of meanings). 胆固醇是血液中的一种蜡状物质。身体需要胆固醇来构建健康细胞�