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Globular clusters have some of the oldest stars inthe universe .

球状星团中有很多宇宙中最古老的恒星。

Cabbage structurally consists of clusters of stiff leaves superimposed one over the other in compact layers , giving it a round or globular shape .

在结构上，卷心菜是由很多硬的叶子密密的层层包裹，形成一个球形。

Globular clusters once ruled the milky way .

球状星团曾经统治着银河系。

On a galactic scale , globular clusters are indeed not all that big .

以一个星系规模计算，球状星云其实不是全都那么大。

Globular clusters are nearly spherical groups of hundreds of thousands of stars bound by gravity .

球状星团是近乎球形恒星群，由成千上万颗恒星构成，这些恒星通过引力作用被束缚在一起。