1. The regularity is significant for explaining colouration of pearl, appraising the colour and identification of black pearls. 这对珍珠的颜色成因解释、评价和鉴定均有意义。
2. The vibration types and existence format of water in the emerald are revealed. Further, the colouration mechanism of the emerald is discussed. 揭示该类型祖母绿中水分子的存在形式及振动类型，并进一步探讨其呈色机理。
3. Colouration process on copper surface for decoration had been used in many fields. Several new kinds of process were introduced with their feature. 铜表面装饰着色工艺已广泛用于轻工及民用等许多领域中，本文介绍几种新的着色工艺及特点。
英英解释
n.
1. the timbre of a musical sound
2. appearance with regard to color
3. choice and use of colors (as by an artist)
