求翻译：样品的测定：准确取澄清透明的 0.5mL 提取液，置于 10mL 的比色管中，用 2%偏磷 酸稀释至刻度后摇匀。以蒸馏水为参比，在波长 243nm 处，用 1cm 石英皿测定其吸光 值。是什么意思？

Determination of the sample: 0.5mL accurately take clear and transparent extract, placed in 10mL colorimetric tube, diluted with 2% metaphosphoric acid to the mark after the shake. With distilled water as a reference, at the wavelength of 243nm with 1cm quartz dish absorbance values.

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Sample determination: Takes accurately clarifies transparent 0.5mL to extract, puts in 10mL in the color comparison, dilutes with 2% metaphosphoric acid after the scale division swings uniform.Take the distilled water as the senate ratio, in wave length 243nm place, determines its extinction value w

Sample measurement: accurate access to clarify transparent 0.5mL extract, placed in the 10mL of colorimetric tube, shake with the relatively dilute phosphoric acid to 2% scale. For reference to distilled water, length is 243nm, with 1cm quartz cell with determination its absorbency.

Determination of the sample: 0.5mL accurately take clear and transparent extract, placed in 10mL colorimetric tube, diluted with 2% metaphosphoric acid to the mark after the shake. With distilled water as a reference, at the wavelength of 243nm with 1cm quartz dish absorbance values.