well, first I am sorry that my pc is english edition:)

well, Utility and preferences in fact are two different streams of consumer theory in microeconomic analysis. utilites are choice baised structure, describing consumer's desirity to certain choice bundles when facing choosing, while preferences is an ordinal based approach, which could only rank consumer's choice, but can't tell out in how much degree that good 1 one is prefered to another. But these two theory could be connected by using weak axiom of revealed preference. more strictly incorporate of these two theories are based on strict assumptions on preferences, such as local nonsatility, monotone, continunity, convexity, and then, these two could be connected using utility maximumation problem and expenditure minimization problem, where walsrasam demand and Heckian demand could be equality at the optimal point:)

效用是消费者对商品的满意程度，与偏好没有直接联系。

效用随着消费者消费商品的数量的递增而递减；而偏好却不是这样的，偏好与消费的商品的数量没有直接关系。