有磺存在时,淀粉即呈蓝色.Starch yields a blue color in the presence of iodine.当灭空呈蓝色时;不大可能会下雨.When the sky is blue , it is improbable that it will rain.红外光谱系中, 短波长呈蓝色, 长波长呈红色.In infrared light, shorter wavelengths look blue, and lon...