The second stain is called Rose Bengal. It highlights the dry areas on your eye so the extent of the problem can be determined.
第二种是孟加拉玫瑰红，它能突出你眼球上的干燥区域从而确定其范围。
The curvature is the second order derivative of displacement. Also, it has a liner relationship with stain.
曲率又是位移的二阶导数，同时曲率又与应变存在着一一对应关系。
The curvature is the second order derivative of displacement. Also, it has a liner relationship with stain.
曲率又是位移的二阶导数，同时曲率又与应变存在着一一对应关系。
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