When biped robot walks on the uneven ground, over-obstacle motion needs to be generated in response to terrain character.

两足机器人在崎岖不平的地面上行走时，需要根据地形特征产生相应的越障步行运动。

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Most competition cars will only roll over if they hit an obstacle.

多数赛车在撞到障碍物时都会翻车。

《柯林斯英汉双解大词典》

It was another obstacle he had to go over.

这是他需要克服的又一个障碍。

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If Mr Kozlov's clean-up continues, the biggest obstacle may be over-regulation.

ECONOMIST: Russian banks

In a big survey of business perceptions this year the number of firms that reckoned over-regulation was an obstacle to success fell from 62% in 2009 to a (still high) level of 55% in 2012.

ECONOMIST: Bagehot

The biggest single obstacle to a Serbian clearing of minds is the continued rule over rump-Yugoslavia of President Slobodan Milosevic.

ECONOMIST: A little gleam of law in Serbia