英语翻译the conversion factor of Golden Rice b-carotene to retin

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英语翻译
the conversion factor of Golden Rice b-carotene to retinol is 3.8 +/- 1.7 to 1 with a range of 1.9–6.4 to 1 by weight,or 2.0 +/- 0.9 to 1 with a range of 1.0–3.4 to 1 by moles.
Golden Rice中 b-胡萝卜素到维生素A的转化率为 3.8(正负1.7误差)比 1
后面那个 “with the range of 什么什么” 怎么翻译啊没读懂 5555

这是一个关于金米的维生素A的测试实验的文章
我网上搜了一下全文,看了一下
这是最后的结果数据
意思是
金米的胡萝卜素B和维生素A的传化量是 1克米转化3.8 +/- 1.7 微克(的胡萝卜素变成维生素A) 也就是1克米转化范围在1.9-6.4,或者用摩尔单位计算就是 1克米转化2 +/- 0.9 摩尔也就是一克米转化范围是1-3.4摩尔
with a range of 其实就是解释前面那个 3.8 加上1.7 减去1.7的那个范围
虽然数值不是正好相等,但是是解释这个意思
下附原文的一部分
Our results showed that the mean (+/-SD) area under the curve for the total serum response to [2H]retinol was 39.9 +/- 20.7 microg x d after the Golden Rice dose.Compared with that of the [13C10]retinyl acetate reference dose (84.7 +/- 34.6 microg x d),Golden Rice beta-carotene provided 0.24-0.94 mg retinol.Thus,the conversion factor of Golden Rice beta-carotene to retinol is 3.8 +/- 1.7 to 1 with a range of 1.9-6.4 to 1 by weight,or 2.0 +/- 0.9 to 1 with a range of 1.0-3.4 to 1 by moles.

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