1·She says there are two layers showing the association, one about 30,000 years old, the other 35,000 years old.
她说有两层显示了这种联系，一层有大约3万年历史，另一层3万5千年。
2·Because of the cold temperatures, the tundra has two layers: top layer, which is called the active layer, is frozen in the winter and spring, but thaws in the summer.
由于寒冷的气温，冻土带有两层：最上面的一层被称为活动层，在冬季和春季被冻结，但在夏季解冻。
3·The overlap of the two layers creates a moiré effect.
这两层的重叠构成了云纹效果。
4·The controller brings the two layers together.
控制器将这两个层联系在了一起。
5·Anything above those two layers is implemented in XML.
这两层上面的一切都使用XML实现。
6·The mesophyll consists of two layers of palisade parenchyma.
叶肉是由两层栅栏薄壁组织组成。
7·Step 6: Duplicate the Star Diffusion layer and group the two layers
第六步：复制星光柔化图层并另建包含这两图层的图层组
8·Then the other two layers are sprayed onto it using an inkjet printer.
然后使用喷墨打印机将另外两层喷涂到铝层上。
9·We'll refer to the first two layers as high-level and low-level service layers.
我们将前两层称为高级服务层和低级服务层。
10·Next, you'll learn how to use XML-based IoC to implement one of the two layers.
接下来，您会学到如何使用基于 XML 的 IoC 来实现两层中的一层。