研究表明，随着接枝率的升高，膜的后退角减少。
DCA results show that the receding contact Angle decreases as the gr aft rate increases.
杰克立马停住并后退一步回到暗角里。
Jack stopped immediately and took one step backward, back into the shadow of the corner.
基于不亏本原则，确定回采下盘三角矿体的最合理切岩高度和后退距离。
Then, based on the principle of not losing money in mining, the optimal cutting rock height and stoping distance for extracting lying side triangular ore pillar are optimized.
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