系统软体阶层 System Software Level
这种软件工程体系层次 Software Engineering Architectural Layers
五层软件体系结构 five-tier software architecture
多层软件体系架构 Multi-Tier Software Architecture
软件体系结构层注入点 Architectural joinpoint
事实上，含有软体动物的化石层已经被发现很多年了。
In fact, fossil beds containing soft-bodied animals have been known for many years.
珍珠层很早就引起了人们的关注，它是软体动物贝壳中普遍发育的一种结构单元。
The nacre is known by people's attention for a long time which is one of the general construction units of mollusk shell.
以模拟软体动物珍珠层的周期性基质控制形成过程制备仿生层状复合材料。
Fabrication of biomimetic laminated composite by mimicking the cyclical matrix control process to form the highly structured Mollusca nacre was presented in this paper.
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