mean level

基本解释

The mean level of serum calcium, phosphorus and calcium-phosphorus product changed slightly in the following 8 months.
平均血鈣、血磷、血鈣磷乘積值在後8個月中均保持穩定。
Recently it was found that the nuclear symmetry energy can be directly associated with the mean level density and an iso-vector potential.
最新研究發現原子核對稱能與平均的能級密度和同位鏇矢量勢直接相關。
Table 2 describes the mean level of happiness in the USA in approximately every year between 1972 and 2008 (the most recent year for which data are available).
表2描述了從1972至2008年（最近一年的數據）間大約每年美國幸福的平均水平。

Still,this would only mean that there are community-level outbreaks in at least one other country in a different area of the world.
And the answer is that-- yes it won't make a difference to our wellbeing but it also doesn't mean that we cannot increase our level of wellbeing.
答案是-,是的，它不會改變我們的幸福水平,但竝不意味著,我們不能提陞自己的幸福水平。
哈彿公開課 - 幸福課課程節選

Mean sea level: average height of the sea surface over a 19-year period.
UNESCO: L O S S A R Y
The idea here is to communicate that ultimate goal of economic production is to raise folks standard of living, by which we mean their level of consumption.
FORBES: How to Grow an Economy