A degree of agitation is necessary on the wire to keep fibers from flocking prematurely and causing poor sheet formation.

在网部需要一定程度的搅动以防止纤维絮聚导致纸页成型不良。

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If these ridges are of the correct size, spacing and energy level, the can be quite helpful in maintaining good sheet formation.

如果这些脊状浆流具有合适的大小、位置和能量级别，它们对保持良好的纸页成型非常有帮助。

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Water is driven up through the sheet into the dandy and downward through the wire; the redistribution of water causes shear on the fibers and improves sheet formation.

水向上进入水印辊，向下透过网子，水的重新分布产生剪切力可以改善纸页的成型。

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About 14 million years ago, a period of climate change caused the formation of the Antarctic ice sheet, which averages one mile in thickness and gets up to three miles thick in some parts.

BBC: How Antarctica works