Seeing a black hole form is almost impossible.

看见黑洞形成几乎是不可能的。

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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。

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BDUF, in its finest straw-man form, embodies ivory-tower architects creating design artifacts, dropping them through a hole in the floor for hapless coders to implement with no changes.

BDUF 以其优秀的稻草人（straw-man）形式体现了象牙塔架构，创建设计工件，不作任何更改直接交给开发人员来进行实现。

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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

Over the course of the next few hundred million years, the two black holes in NGC 6240, which are about 3, 000 light-years apart, will drift towards one another and merge to form an even larger supermassive black hole.

BBC: Black holes on collision course

Economists in Thailand suggest reviving plans for a gargantuan construction project digging a hole through the isthmus in southern Thailand (not quite pure Keynes: the hole would not be filled in, but form a canal tunnel linking the Pacific and Indian oceans).

ECONOMIST: Still sick and gloomy, now rebellious