如果接收路由器发现至同一网络的多个路径的尺度值不同，则拥有最小尺度的路径即为至此网络的可行距离（Feasible Distance）,即FD。拥有最佳尺度的路径进入路由表，因为这是到达网络的最快方法。
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If a headset isn’t feasible, holding your phone just slightly away from your ear can make a big difference; the intensity of radiation diminishes sharply with distance.
如果你连蓝牙无线耳麦也没有的话，将电话拿离耳朵稍微远一点，也会有很大的不同，辐射的强度会随着距离的拉远而迅速减少。
More speculatively, it could make long-distance space travel more feasible by slowing down ageing and reducing the consumption of oxygen and food.
理论上，它还能通过延缓衰老和降低氧气与食物消耗来实现长距离和空间的旅行。
The result showed that it was feasible to describe the fruiter shape by using the level distance data measured by ultrasonic sensor.
试验结果表明，以超声波传感器测得的水平距离数据作为描述果树外形的依据基本可行。
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