1.
a layer or two of something to protect it, and food.
一两层的保护层以及发育所需要的食物。
2.
having a thickness made up of two layers or strands.
有两层或两股厚度的。
3.
Two or more layers of fabric are combined by pushing barbed needles through them.
用钩针将两层或两层以上的织物缝合。
4.
Two cell layers( diploblastic) separated by a gelatinous mesoglea.
两层细胞(胚层)中间是凝胶状的中胶层。
5.
He lives in a house of two storeys.
他住的是两层楼的房子。
6.
two tier car carriage
装运两层汽车的车辆
7.
a two-tiered system,ie one with two distinct levels
双重系统（有两个层次的）.
8.
a line of demarcation between two rock strata.
两个岩层间的分界线
9.
The head distribution is different in the two layers.
两层中的水头分布不同。
10.
but I prefer a two-story home.
但我喜欢两层楼的房子。
11.
A vein of mineral ore deposited between clearly demarcated layers of rock.
位于层次分明的两层岩石之间的矿脉
12.
The relative movement between the two sides of a fault.
断层位移断层两侧的相对位移
13.
Advanced Two Layer Polyethylene Pipeline Protective Coating Technology
先进的两层聚乙烯管线防护涂层技术
14.
Groundwater-Head Fluctuations in Coastal Confined Two-Layer Aquifer System with Submarine Outlet-Cappping;
含有淤泥层边界的两层含水层系统的水头波动
15.
Brief Analysis of the Two Levels of Classroom Teaching in College;
浅谈大学“两课”课堂教学的两个层次
16.
Main Street with its two-story brick shops.
大街的两旁立着一些两层楼高的砖砌的商店。
17.
Much of Bangladesh consists of two overlying freshwater aquifers, a shallow one( which reaches down as far as70 meters) separated from a deeper one by layers of clay.
孟加拉大部份地区都有两层相叠的含水层，由黏土层将较浅（深达70公尺）较深的两层隔开来。
18.
Hummel has worked out the theory for the twoand-three-layer cases using the method of images.
哈梅尔用电象法建立了两层和三层条件的理论。