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汉语拼音：sè sù

使有机体具有各种不同颜色的物质。某些色素在生理过程中起很重要的作用，如植物体中的叶绿素能进行光合作用。

1. 使有机体具有各种不同颜色的物质。

   王统照 《沉思》：“她那白润中显出微红的皮肤色素，和那双一见能感人极深的眼睛……都表现出难以形容的美丽。” 秦牧 《艺海拾贝·鲜花百态和艺术风格》：“由于一些基本色素的复杂配合，加上折光作用，花的颜色就变化无穷了。”

• Our range of herbal teas contain no preservatives, colourings or artificial flavourings.

  我们这一系列的药草茶不含防腐剂、色素以及人工调味品。

• Glass bottles are filled with water tinted with food colourings.

  玻璃瓶中盛满了被食用色素染过色的水。

• A few drops of green food coloring were added.

  加了几滴绿色的食物色素。

• It is better to avoid all food colours.

  最好不要吃任何食用色素。

• This sauce is full of E-numbers.

  这种调味汁尽是人造香料和色素。

• The colouring pigments from the skins are not allowed to bleed into the grape juice.

  外皮上的色素不能渗到葡萄汁里面去。

• Similarly, any pigment nevus that is chronically irritated should be excised.

  同样, 凡是经常受慢性刺激的各种色素痣切勿予以切除.

• The color of red grapes is in the skin.

  红葡萄的色素存在于果皮中.

• This chromoprotein has also been endowed with enzymatic properties.

  这种色素蛋白也具有酶的特性.

• This brand of tinned beans contains no artificial colouring.

  这种品牌的罐装青豆不含人造色素.

• When highly purified, the red - absorbing form of the pigment is blue - green.

  如果高度提纯, 这种色素的红光吸收型是蓝绿色的.

• The photosynthetic pigment in bacteria is bacteriochlorophyll.

  细菌光合作用的色素是细菌叶绿素.

• Cytochromes can be detected by their spectral characteristics.

  细胞色素可通过其光谱特性检测.

• We are still very far from explaining how photochrome acts on a cellular or molecular level.

  关于光敏色素怎样在细胞水平或分子水平上发生作用,我们现在还远远不能解释.

• This method should eventually help to identify substances that phytochrome reacts with inside the cell.

  这个方法终将有助于检识细胞内同光敏色素发生反应的物质.