An index with many key columns is called a wide index.

具有许多键列的索引称为宽索引。

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A wide index is frequently associated with a large key length.

宽索引的键长度通常较大。

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Other health benefits packed into berries: They're rich in a wide variety of antioxidants, low in calories, and even have a low glycemic index (shown to better maintain steady blood sugar levels).

浆果对健康的益处还有很多：它们都富含多种抗氧化剂，低热量，并含有较低的甘油指数，可以更好地维持稳定的血糖水平。

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EU-wide harmonised index of consumer prices, the gap between British inflation and those of France and Germany is smaller than on national measures.

ECONOMIST: The economy

The ministry stopped publishing its nation-wide home price index last year.

BBC: China home prices continue to slide for fifth month

There is a wide variation around the index return which at the tail can be devastating.

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