Conservationists in South Africa are infusing a special red dye into the horns of live rhinos.

南非环保人士将种特殊的红色染料注入活犀牛的角中。

We marked a weak rip current with red fluorescent dye, which otherwise would not have been apparent.

我们红色荧光染料标记个微弱的离岸流，否则会十分不明显。

It's either red or pink dye, okay?

-要么是红色染料要么是粉色染料，好吗？

So let's start with the most widely used food coloring in the world: Red Dye Number 40 known in Europe as E129.

让我们从世界上广泛的食色素开始：红色染料 40 号，在欧洲被称为 E129。

This bright red dye is produced by a specific kind of true bug: female cochineal scale insects.

这种鲜红色染料是由种特殊的真正昆虫产生的：雌性胭脂虫。

On Saturday, California Governor Gavin Newsom signed a law that bans Red dye No.3 and other potentially harmful food additives and consumer goods.

上周六，加利福尼亚州长加文·纽森项法律，禁止红色染料3号和其他具有 潜在有害物质的食品添加剂和消费品。

Today, the main exporters of the red dye are Peru and the Canary Islands, where the bugs are farmed on prickly pear plantations.

今天，红色染料的主要出口国是秘鲁和加那利群岛， 那里的仙人球种植园养殖这种虫子。

It's name comes from the Moroccan city Fez, the city that historically produced dye made from crimson berries to color the hat.

它的名字来自摩洛哥城市非斯，这座城市历史上生产由深红色浆果制成的染料来为帽子着色。

Eosinophils take up a red acidic dye called eosin; their main function is to detoxify foreign proteins, especially those causing allergic reactions.

嗜酸性粒细胞吸收种叫做伊红的红色酸性染料;它们的主要功能是解除外源蛋白质，特别是那些引起过敏反应的蛋白质的毒性。

As the plants grew, scientists injected the plant stems with red and blue dyes so that they could distinguish between the roots of competing plants.

随着植物的生长，科学家们将红色和蓝色染料注入植物茎中，以便他们能够区分竞争植物的根。

Back in his day, a few scientists had been tinkering with staining tissues, especially with a compound called carmine — a red dye derived from the scales of a crushed-up insects.

在他那个时代，些科学家直在修补染色组织，特别是种叫做胭脂红的化合物——种从压碎的昆虫鳞片中提取的红色染料。

So many food chemists use Red Dye Number 40 because it's not only cheaper to make from scratch than it is to extract carotenoids from other food, but the color also lasts longer on the shelf.

所以许多食品化学家 40 号红色染料，因为它不仅制作起来比从其他食物中提取类胡萝卜素便宜，而且其颜色在货架上也能持续更长时间。