tunnel piercing的意思|示意

When estimated by inherent standard deviations of GPS receivers, the accuracy of lateral piercing can also meet the needs of a horizontal tunnel control network.

采用GPS接收机标称精度进行估算，其结果也满足隧道控制网的要求。

The windswept trees forming a kind of tunnel, the sun piercing through the upper layer of the fog and the limited visibility provide for a very special effect. It appears quite unreal.

被风刮的树木形成了某种特殊类型的隧道，太阳穿透了高层的雾，使有限的能见度提供了非常特殊的效果，看起来相当虚幻。