求翻译：用95%乙醇、丙酮、甲醇及乙酸乙酯对杜仲叶进行常温震荡提取,采用二苯基苦基肼自由基（DPPH.）法测定各提取物的抗氧化活性.是什么意思？

With 95% ethanol, acetone, methanol and ethyl acetate at room temperature shocks on the leaves of Eucommia extract, bitter hydrazine using diphenyl radicals (DPPH.) method for the determination of the antioxidant activity of extracts.

With 95 % ethanol, acetone, methyl alcohol, ethyl acetate extract of eucommia ye carried out at room temperature, using 2 -phenyl-2 -bitter shocks based hydrazine free radicals (DPPH Measurement Law). The extract antioxidant reactive .

With 95% ethyl alcohol, the acetone, the methyl alcohol and the ethyl acetate carry on the normal temperature shake extraction to the Eucommia leaf, uses the diphenyl picryl jing free radical (DPPH.) the law to determine each extraction oxidation resistance activeness.

95% ethanol, acetone, methanol and ethyl acetate extract from eucommia leaves at room temperature shocks, uses two phenyl hydrazine based free radicals (DPPH.) method for the determination of the antioxidant activity of extracts.

With 95% ethanol, acetone, methanol and ethyl acetate at room temperature shocks on the leaves of Eucommia extract, bitter hydrazine using diphenyl radicals (DPPH.) method for the determination of the antioxidant activity of extracts.