There was a half of bason of offwhite barnyard grass flour on the chopping board, it looked like arranging for in advance.

案板上放着半脸盆灰白色的稗子面，看来是事先给我准备的。

White crystal or offwhite powder, undissolving in water or alcohol, dissolving in concentrated sulphuric acid or hydrochloric acid or ammonia or potassium iodide.

白色结晶或灰白色粉末，见光易分解变成棕黄色。不溶于水和乙醇。溶于浓硫酸和盐酸，亦溶于氨水、碘化钾。