玻璃棒研磨能够提高蛋白质的浓度；
Glass rod grinding can improve the concentration of protein;
在玻璃棒下面，光穿过玻璃后发生折射。
Under the glass block, light is refracted on passing through the glass.
最后他又买了一品托纯甘油和一根一英尺长的玻璃棒。
Finally he bought a pint of pure glycerine and a glass rod a foot long.
最后他又买了一品托纯甘油和一根一英尺长的玻璃棒。
Finally he bought a pint of pure glycerine and a glass rod a foot long.
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