在地面凹凸不平地区也常用反铲挖土机挖沟。
A backhoe is often used in ditching where the soil conditions are usually rough.
天文学家试图用这样的理论来解释，为什么月球的背地面比向地面更加凹凸不平。
The astronomers came up with the scenario to explain why the moon's far side is so much more hilly than the one that is always facing Earth.
小心石块的锐利边缘、松散、湿滑及凹凸不平的地面。
Beware of sharp edges on rocks as well as loose, slippery and rugged ground surfaces.
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