When cirrostratus clouds are disturbed by planes or strong winds, the droplets can freeze instantly or evaporate, the latter of which will form the hole.

当卷层云受到飞机或强风的干扰时，水滴会立即冻结或蒸发，若为蒸发就会形成孔洞。

youdao

And we have a form of that here in Australia when we had the holey dollar...... when we had a coin with a hole in the middle because there was a shortage of metal.

澳大利亚就曾有过一种这类的货币，一种中间有个洞的货币。这是由于当时缺乏铸币金属的缘故。

youdao

When the hooks align with one of the punched holes, they are able able to pass through the hole with a thread, thus creating the required stitch to form the pattern.

吊钩对准一个打孔时，可以带线过孔，织出纹样里的一针来（译者注，这里正确的描述应该是：每个孔的位置对应一根经线，根据打孔或不打孔决定提或不提起经线，并交织一次）。

youdao

Instead of a black hole taking energy in, he's a pulsar pumping it out in the form of pain relieved, at least for a while, by wry humor and an openness to Jane's beauty.

WSJ: Jane Eyre, Mars Needs Moms and Red Riding Hood | Film Reviews by Joe Morgenstern

It was that pulsars are rotating neutron stars, the super-dense last stage of collapse of a star not quite heavy enough to form a black hole.

ECONOMIST: Obituary

More quant easing is likely in the form of bond buybacks and other non-security instruments that blew a big hole in the market in 2008.

FORBES: Ron Paul's Fed Talk Gets Some Talking Monetary Policy Change