active barrier system的用法和样例：
- Objective 23 built and refitted laboratory animal barrier system facilities were surveyed in Shanghai.
- It will provide technical data for formulating new environmental standards of laboratory animal barrier system in future in our country.
- Enclosing the line is an isolating or restricted access barrier system (RABS) that was also customized to a certain degree.
内附线是一个孤立或限制进入屏障系统（ rabs ） ，这也是自订到一定程度。
- The serum content of five kinds of trace elements in clean KM mice fed with normal feedstuff in SPF barrier system were determined by AAS and analysed with statistic method.
- The content of 5 kinds of trace elements in serum of clean KM mice feeding with eggs in the barrier system was determined by AAS and analysed with statistic method.