剑桥雅思13听力文本翻译Test3!为了帮助大家更好的提高雅思考试中的听力部分，下面小编为大家整理剑桥13的听力文本，希望通过这些文本知识的学习，能够辅助大家更好地来提升听力能力。
So what natural dyes did you look at?
Well, one was turmeric.
The colour's great, it's a really strong yellow.
It's generally used in dishes like curry.
It's meant to be quite good for your health when eaten.
But you might find it's not permanent when it's used as a dye-a few washes, and it's gone.
Right, I used beetroot as a dye for wool.
When I chop up beetroot to eat I always end up with bright red hands.
But the wool ended up just a sort of watery cream shade.
Disappointing. There's a natural dye called Tyrian purple. Have you heard of that?
Yes. It comes from a shellfish, and it was worn in ancient times.
But only by important people as it was rare.
I didn't use it. It fell out of use centuries ago, though one researcher managed to get hold of some recently.
But that shade of purple can be produced by chemical dyes nowadays.
Did you use any black dyes?
Logwood. That was quite complicated.
I had to prepare the fabric so the dye would take.
I hope you were careful to wear gloves.
Yes. I know the danger with that dye.
Good. It can be extremely dangerous if it's ingested.
Now, presumably you had a look at an insect-based dye?
Like cochineal, for example?
Yes. I didn't actually make that,
I didn't have time to start crushing up insects to get the red colour and anyway they're not available here.
But I managed to get the dye quite easily from a website. But it cost a fortune.
I can see why it's generally just used in cooking, and in small quantities.
Yes, it's very effective, but that's precisely why it's not used as a dye.
I also read about using metal oxide.
Apparently you can allow iron to rust while it's in contact with the fabric, and that colours it.
Yes, that works well for dying cotton.
But you have to be careful as the metal can actually affect the fabric
and so you can't expect to get a lot of wear out of fabrics treated in this way.
And the colours are quite subtle, not everyone likes them.
Anyway, it looks as if you've done a lot of work. . .
所以你研究了什么自然染料呢?
哦，一个是姜黄。
那个颜色很棒，是非常明亮的黄色。
它一般会在咖喱这种菜里面用到。
所以吃起来对身体健康很好。
但是你可能发现如果作为染料的话，它不够持久——洗几次就全都掉色了。
对，我用甜菜根给羊毛染色了。
每次切甜菜根吃的时候，我的手都会是红红的。
但是羊毛只是有点水黄色的阴影。
太令人失望了。有一种叫做泰尔红紫的天然染料。你听说过吗?
是的，它取自于一种贝类，古代的时候有人穿。
但是只有那些重要人物才会穿，因为它很珍稀。
我没有用它。几个世纪之前它就不再使用了，尽管有一个研究人员最近想做出一些。
但是那种紫色现在可以通过化学染剂做出来。
你用了黑色染料吗?
洋苏木。那真的很复杂。
我得准备染料能够染上的材料。
我希望你带了手套。
是的，我知道那种染料存在危险。
好的。如果不小心食用的话，它真的超级危险。
现在，你大概已经研究过了昆虫染料了吧?
比如说，胭脂虫红?
是的。事实上我并没有做，
因为我没有时间碾压昆虫来提取红色，而且这里没有胭脂虫。
但是我能从一个网站上得到这种染料。但是很贵。
我知道它为什么通常只用于烹饪了，而且量很小。
是的，它非常有效，但是那可能是它没有用做一种染料的原因。
我还读了一些有关使用金属氧化物的书。
当铁和织物接触的时候，你可以让铁生锈，就会给织物上色。
是的，这样给棉花染色挺好的。
但是你得很小心，因为金属会影响织物，
所以你做很多使用这种方法制作的织物成衣。
而且颜色比较淡，不是所有人都喜欢。
但是，能看出来你做了很多工作...
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