Leaf area index (LAI) is an essential parameter for monitoring crop growth dynamic.

叶面积指数(LAI)是估算作物生长的关键参数。

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Testability is the essential parameter to evaluate and guarantee the functional quality of products.

可检测性是衡量并确保产品功能质量的重要特征参量。

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Scores of sensory quality of a building is an essential parameter in the evaluation of a unit engineering quality.

观感质量的评定得分率，是组成单位工程质量“合格”、“优良”等级的内容之一。

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