The largest blocks are over 10 ft ( 3 m ) long .

最大的石块的长度超过了10英尺（3米）。

It was viewed from about 13 ft ( 4 m ) above sea level .

看到的虚幻图像约高出海面13英尺（4米）。

That would mean that the speed would be 180 m / s or 400 mph .

那意味着飞机的速度就是180米/秒，也就是400英里/小时。

All the cylinders can be blocked when the vehicle overcomes ditches that are up to 4 m wide .

当车辆需要通过宽4米以上的水沟时，这些气缸可以都被塞住。

The researchers were able to " reconstruct " nearly 1000 sq m of the forest 's trees and plant distributions .

研究人员能够“重建”出这片接近1000平方米的森林中的树木和植物分布。