Gouache paintings in the wet and dry pigments different. Under color changes, Gamut not wide, has been dry in solid colors on the cover of convergence rather difficult time, painting too thick paint dry off after cracking easy, there are difficult long-term preservation, etc. inadequate.
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Rinse spoon under cold water and repeat procedure until thermometer-shaped area no longer changes color.
勺冷水下冲洗和重复过程，直到温度计形的面积不再改变颜色。
A lot of chromophores can also lead to the color changes of the bamboo slips under the reaction of light and oxygen, but they will not cause too dark colors.
许多发色基团在光和氧的作用下也会导致竹简变色，不过它们不会引起竹简变色过深。
The left arteriorenal(LRA) hemodynamics changes in 49 cases during intracardiac operation under direct vision were studied by transesophageal color Doppler imaging.
应用经食管彩色多普勒超声仪研究49例心内直视术期间左肾动脉（LRA）的血流动力学变化。
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