In rejecting utility as a measure of value, they arrived at a labor cost theory of value, wherein utility was regarded as a condition or prerequisite of value but not as a measure of it.
在拒绝将效用作为价值量度的同时，他们形成了价值的劳动成本理论。在该理论中，效用被认为是价值的基础或先决条件，但不是价值的量度。
Stem flow gauge can measure plant flow rate directly. In this paper, we have evaluated the value of the instrument through farmland experiment and theory calculation.
通过田间试验及理论计算，验证了对茎流计在测量作物蒸腾方面的实用价值。
There are some mistake about the theory of measure of value on forest resources.
森林资源价值计量存在着一些理论上的误区。
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