In May, she and three student researchers reached a milestone: They concocted(8) a chemical mixture that turns from blue to colorless when Rohypnol is added.

• 五月份，她和三名研究生取得了里程碑似的进展：他们调和出一种化学混和物，当迷奸药被加入时可以由蓝色变为无色。