Small black holes, between three and 20 times the mass of the sun, are created when big stars collapse and leave behind a gravitational pull strong enough to block nearby light rays.

为太阳质量三到20倍的小型黑洞，是在大恒星坍塌时创造的，并且留下一个足以阻止附近光线的重力拉力。

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As they point out, three of the largest countries, plus one other, can block any decision, whereas it takes a big coalition of small countries to achieve such a result.

BBC: NEWS | Europe | Poles in war of words over voting