We need to put in fencing along highways and crossing structures over the highways.

我们需要沿高速公路立栅栏，安装跨越高速公路的穿越建筑。

We looked at how many times an animal would attempt to use the crossing structure before they were able to successfully get to the other side.

“我们关注的是，动物要尝试穿越通道多少次才能成功到达另一边。