base layer

基本解释

As the electric crawler inches forward along a sand base layer, the bricks are automatically packed together by gravity.
隨著這個電動鋪路者在砂基路麪上一點點曏前行進，甎塊便因爲地心引力自動碼放在一起。
Often, you will only need this in the coldest weather, when the fleece adds extra insulation between your base layer and your outer layer.
通常你衹在最冷的日子才需要穿上這一層衣物，羊毛會在你的內衣和外套之間建立一個額外的隔絕層。
Leaving it out can cause problems such as being unable to pan at all or having additional layers badly misaligned on top of the base layer.
如果不指定，可能會出問題，比如根本不能平移或是有額外的層在基層上不能很好地對齊。

The base layer of modern skis is made from a substance called ultra-high-molecular-weight polyethylene.
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Dual-shot adds a second layer of colored, transparent or translucent polycarbonate on top of a base layer to produce secondary color blends and depth effects.
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a piece of clothing worn under your other clothes, made of material that is designed to keep you warm and dry