Methods: In the imaging of human lymphocytes, the backweight method and contract expand method were employed to wipe off the role noise and crack noise respectively.
方法：采用灰度倒数加权法以消除缝隙噪声，收缩再扩张法以消除斑点噪声，达到光滑细胞边缘之目的。
2
The anchorman flung his whole weightback, tightening the rope.
这位排尾压阵队员用尽全部的力气往后拽，把绳子拉紧。
《柯林斯英汉双解大词典》
3
The mule's back was hollowed by the weight of its burden.