background level 基值电流 ; 背景值 ; 背景水平 ; 本底水平
allowable background level 容许本底水平 ; 释义容许本底水平
high background level 高本底水平
background level constitutive synthesis 本底水平的永久型合成
radioactive background level 放射性本底水平
geochemical background level 地球化学背景值
background level of soil 土壤背景值
natural radioactive background level 天然放射性本底
local mircroseismic background level 局部脉动背景水平
It can't be denied that the College Entrance Examination creates a relatively level playing field for students from all family background.
不可否认的是，高考给不同家庭背景的学生创造了相对公平的竞争机会。
The right level of background noise may interrupt our normal patterns of thinking just enough to allow our imaginations to wander, without making it impossible to focus.
适当水平的背景噪音可能会打断我们正常的思维模式，足以让我们发散想象力，而不会让我们无法集中注意力。
Since the results at 70 decibels were significant, the study also suggests that the right level of background noise—not too loud and not total silence—may actually improve one's creative thinking ability.
由于70分贝的噪音所产生的结果很明显，所以该研究还表明，适量的噪音环境——不太大声而不是完全寂静——实际上可能会提高一个人的创造性思维能力。
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