当然，贝拉德要求助于电脑，不过你也可以用最简单的办法在自家客厅计算圆周率，所用材料只是几根针和一张横格纸。
He used a computer, but you can also calculate pi at home with some needles and a sheet of lined paper.
本文研究了针、阔叶木未打浆纤维的粗度、长度及其长度分布特性对成纸性能的影响。
This study dealt with the effects of fiber length, coarseness and length distribution on the properties of paper produced from unbeaten HW & SW pulp.
横标针：单张纸印刷机上，使纸张作横向位置对齐的导规。
Side lay: the guide on a sheet-fed press which positions the sheet sideways.
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