It's related to mangel and chard. It's a biennial and is. usually grown in a cool climate.

它同饲用甜菜或牛皮菜的亲缘很近，两年生，通常栽培在冷凉的气候条件下。

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In a cool climate, its appears pure blue, but darkens to a purple when the temperature rises.

在凉爽的气候下，它呈纯蓝色，但随着温度的升高，它会变暗，逐渐呈现出紫色。

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White wine made from grapes grown in a cool climate is often paler, with a higher amount of acid.

使用在凉爽气候中生长的葡萄酿制的白葡萄酒通常要暗淡一点，而且更酸。

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Iceland's farmers, long used to scratching a hard living from their unfertile land in its cool climate, now hope to export their clean beef and lamb at a premium in the wake of the foot-and-mouth outbreak in Europe.

ECONOMIST: David Oddsson, Iceland��s Eurosceptic leader

This shut out the sun, causing decades of continuous winter sufficient to trigger an advance of ice sheets that, even when the dust cleared, kept the climate cool for more than a thousand years, at least in the Northern Hemisphere.

WSJ: Matt Ridley on New Support for a Global-Cooling Theory | Mind & Matter