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20%~40%

20%~40%

20%~40%

20%~40%

1

Surface composition was determined by X-ray photoelectron spectroscopy (XPS). The grafted PC groups can cover 20%~40% of the surface .

射线光电子能谱（XPS ）测定结果表明，接枝磷醯胆碱基团的表面覆盖率可达 20%~40%。

3

Nearsightedness in the U. S. and Europe is said to range between 20% and 40% of the population.

据称，美国和欧洲的近视率占总人口的 20%-40%。

4

Stock pros give widely varying recommendations -- usually anywhere from 20% to 40%.

股市专家各自的推荐相差悬殊，一般在 20%-40%之间。

6

When the percentage composition of Shenfu bituminous coal is about 20%-40%, the combustion of blended coal is accelerated most efficiently.

当神府烟煤的质量分数在 20%~40%时，对混煤燃烧的促进作用最为显著。

8

and the incidence of autonomic nerve pathological change are 20%~40%.

其中，糖尿病患者自主神经病变发生率为 20%~40%。

9

sales of mobile phones and household electronics are up by 20-40%.

移动电话和家用电器销量增长为 20%-40%。

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