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绿茶与乳腺癌的关系
lucy一位外国朋友，希望我能将这篇文章介绍给大家，翻译出来，如下：
Green tea may help prevent breast cancer, based on one study in Asia women. Two population studies also found that Asia women with early-stage breast cancer(stage one and stage two) who drank three to five cups of green tea per day didn't have as many RECURRENCES. The researchers did't see these benefits for women with later-stage TUMOR.
根据一项对亚洲女性的调查研究发现常喝绿茶会防止乳腺癌。对亚洲两成女性的调查发现那些每天喝3－5杯绿茶的早期乳腺癌患者（阶段一和阶段二）不容易出现复发症。研究人员未发现饮用绿茶对晚期乳腺癌患者有显著疗效。
The problem,though,is that these are population studies. Remember that this type of research may find associations between green tea and cancer prevention, but it doesn't prove that green tea is the cause for the benefits we are seeing.
问题是这些仅仅是人口调查。值得注意的是研究的确发现了绿茶和癌症防止的关系，但这并不能证明绿茶就是预防癌症的原因。
问：我了解一下绿茶是否真的对治愈乳腺癌有所帮助。如果我食用了过多的咖啡因，我就会失眠。我是应该喝脱咖啡因的绿茶还是喝普通绿茶？
A: Green tea has beneficial compounds called POLYPHENOLS,or CATECHINS. Most of the research on green tea for BREAST CANCER has been done in ASIA because people there drink a lot of green tea.
答：绿茶中含有对人身体有益的物质叫茶多酚。在亚洲，有许多关于绿茶治愈乳腺癌的研究，那是因为亚洲人会饮用大量的绿茶。
On the other hand, there certainly are a lot of good reasons to Prove that green tea might be helpful for cancer. First of all,the POLYPHENOLS are great ANTIOXIDANTS.They can portect DNA against things such as free radicals that can damage it and lead to CANCER.Also, a specific catechin known as EGCG may prevent new blood vessals from feeding the cancer,and help trigger tumor cells to self-destruct.One study even found that green tea may enhance the effect of a CHEMOTHERAPY drug, ADRIAMYCIN, which is used to treat some types of BREAST CANCER.So far, though, that last experiment has only been done on cells growing in a Lab,not in real-life situations.
另一方面，也有一些充足的理由来证明绿茶是否真对治愈癌症有帮助。首先，茶多酚是最大的抗氧化剂，他们能保护DNA，防止游离基破坏DNA并导致癌症。另外，一种叫做EGCG的特殊茶多酚能阻止给癌细胞输送氧料的血管，并能引发癌细胞的自灭。一项研究甚至发现绿茶能促进一种叫阿霉素的化学药物的功效，它经常被用来处理多种乳腺癌。目前为止，最后的一个实验是在实验室里细胞培育的情况下完成的，而不是在真实生命的条件下。
The amount of caffenine in green tea varies quite a bit, but as a ballpark figure,I usually eastimate around 30 mg per cup.By comparison,drip coffee is around 60 to 180 mg per cup.Based on one study done ar UCLA,decaffeinated green tea had about half the ANTIOXDANT capacity of regular green tea. That said it may depend on how the is decaffeinated. It's thought that a process using carbon dioxide may retain more of the POLYPHENOLS and ANTIOXIDANT capacity than those using ETHYLENE acetate. If you are not sure what process the brand you are drinking uses,you can always call the manufacturer.
咖啡因在绿茶里的含量有很大的区别，但确是可以估计的一个数值。我一般预测为每杯中含有30mg。作为对比，速溶咖啡是每杯60-180毫克。根据美国加利福尼亚大学的一项研究，脱去咖啡因的绿茶是正常绿茶抗氧化剂的容量的一半。也就是说，取决于它是怎样被氧化的。有人认为，在使用二氧化碳的过程中，比那些使用乙二醇二乙酸酯会保留更多的茶多酚和抗氧化剂容量。如果你不能确定你喝的什么品牌，什么制造工艺的，你可以联系生产商。
