随着地轮垂直载荷的增加、抓地板高度的加大，地轮滑移率的均值、方差都减少。
With the increase of vertical load and height of ground wheel, ground wheel slide can be reduced.
在上面这张照片中，这轮因大气折射而显得有些变形的超级满月，紧挨着地平线，就好像正在美国波士顿市上空冉冉升起。
Seen here, the near perigee Full Moon still hugs the horizon, distorted by atmospheric refraction as it rises over Boston, Massachusetts, USA.
原因也许是误解了一些操作的细节问题，比如：左主轮先着地。
Now I think about it and realized in some little details I misunderstand the procedure. Specially the left main gear touch the ground first.
也第一次上了摩天轮，俯看着地下的游乐设施，感觉着孩子们的生活，那时知道自己不是那个年龄的人了。
Looking at the children's play facilities down from the wheel, I knew I was far from that young age.
三轮着地滑跑阶段。
直升飞机通常降落的时候四轮着地，但是也可以两轮着地。
A helicopter usually lands on four wheels, but it can land on two.
本实用新型设计合理，两侧轮可始终保持同时着地。
The utility model has the advantages of reasonable design and two side-wheels can be kept to land on grounds simultaneously.
本实用新型设计合理，两侧轮可始终保持同时着地。
The utility model has the advantages of reasonable design and two side-wheels can be kept to land on grounds simultaneously.
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