名词
中文翻译：双向环路
同义词：
['two-way loop', 'two-way link']
例句：
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1. This new router has a two-way ring down trunk circuit that allows for easy communication between devices.
这款新路由器具有双向环路 trunk circuit，使得设备间通信变得轻松。
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2. The company uses this technology to create a two-way ring down trunk circuit that can connect multiple devices together.
该公司使用这项技术创建了一个双向环路 trunk circuit，可以将多个设备连接在一起。
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3. In the event of a power outage, the two-way ring down trunk circuit will automatically switch to backup power sources.
在发生停电的情况下，双向环路 trunk circuit将自动切换到备用电源。