Often, you will only need this in the coldest weather, when the fleece adds extra insulation between your base layer and your outer layer.

通常你只会在最冷的天气才需要这个，羊毛会在你的底层和外套之间增加一个额外的隔绝层。

Advance package models include further noise reduction using a thicker carpet base layer and front fender liners.

先进的包装模式包括进一步降低噪音使用更厚的地毯基层和前挡泥板衬垫。

And implement a simple model base layer.

还实现了一个简单的模型库层。

Only one base layer can be active at a time.

一次只能激活一个基础层。

The Base Layer is a water animation created using a fractal noise;

该基地是一个水层动画创建使用的分形噪声；