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。
Backing paper: a base layer to give strength or support to a top layer.
托底纸：用来支撑面层的纸以啬强度或承托面层。
I also placed a base layer of wild grass to help define the ground plane.
我还新建了一个野草的图层来帮助地面部分的表达。
Surface preparation of metal before chemical process. Removal of a layer of the base metal.
在化学处理之前的表面准备，移除一层金属基材。
Surface preparation of metal before chemical process. Removal of a layer of the base metal.
在化学处理之前的表面准备，移除一层金属基材。
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