When placed in a box with light and dark compartments, most mice tend to seek refuge in the dark sections-but not the germ-free mice.
当被置于淡与暗区域，大部分老鼠会跑到暗区域，但无菌鼠不会。
ALL new exports sample, gold metal exterior, inside white plastic pillbox with 3 compartments and a round mirror. No box and packing!
全新货辨，金色金属外壳，内有白胶三间隔药盒连一面圆镜，无盒无包装。
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