The wavelength of light is the color of light, which is determined by the material that forms the P-N junction.

而光的波长也就是光的颜色，是由形成P-N结的材料决定的。

youdao

First, the azo dye with N-hydroxyethyl functional group in coupling components is taken as the raw material to have acryloyl reaction, to obtain hair color monomer.

首先用偶合组分上带n -羟乙基官能团的偶氮染料为原料经丙烯酰化反应，得到发色单体。

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The identification of Radix scutellariae was silica gel G plate, n-butanol-glacial acetic acid-water(7:1:2) as the development reagent, chloride ferric(1%) as color developing reagent.

后者黄芩的鉴别：硅胶G薄层板，正丁醇-冰乙酸-水（7：1：2）为展开剂，1%三氯化铁乙醇溶液为显色剂；

youdao

This summer Nokia (nyse: NOK - news - people ) released the N-Gage QD, a phone with a large color screen and built in control pad for gaming.

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Should that occur, we would stand ready to provide solidarity and full public relations support, including four-color brochures to be handed out at ensuing U.N.

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