Punch a hole in the middle of the paper cover where the hole of the spool is. Now your hole should run through the paper, spool, and cardboard without any obstructions.

在纸片棉线轴洞的位置打个洞，这个洞贯穿了纸片、棉线轴和硬纸板，洞内没有其他遮挡物。

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The PIN digits you punch into an ATM’s keypad are leaving traces of themselves behind in the form of heat, says a paper recently presented by a team of UC San Diego security researchers.

加利福尼亚大学圣地亚哥分校的研究小组在近日发表的论文中指出，你在ATM机上键入的密码会以你手指余温的形式留下线索。

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Simply fold the sheets of the paper, blank side facing up, use a paper punch and thread them together with a ribbon.

只需要用订书器或是线把这些纸钉在一起，空白的一面朝着一个方向即可。

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Scrappers can also buy embellishments to suit any occasion, from a miniature Marine uniform to a hole-punch that makes tiny paper butterflies.

ECONOMIST: Hobbies

On the other hand, as the Treasury paper lays out, non-doms, who include shipping tycoons and City high-fliers, pack an economic punch much weightier than their number, currently around 115, 000.

ECONOMIST: Taxing the foreign rich: Collateral damage | The