天空的蓝色渐变成了浅灰色。

The blue of the sky paled to a light grey.

《牛津词典》

现在，我们要为画布顶端创建一个天空蓝色渐变。

Now we are going to create a sky gradient for the top of the canvas.

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在清单3中，蓝色渐变色的stop offset特性在5秒钟内渐渐变大，从而使白色渐变色向外变大并产生爆炸效果。

In Listing 3 the blue gradient's stop offset property grows during the 5 seconds, causing the white gradient to grow outwards and produce an explosion effect.

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