on slippery ground

On slippery ground, Scalise said, “Humans and animals have a natural physical intelligence. They can anticipate or quickly recover on difficult terrain. It’s a challenge to give this intelligence to a robot. It’s hard for a robot to estimate physical quantities like friction and mass of loose objects like rubble when making contact with the ground.”

But with turnout low at about 30 percent and most major political parties boycotting the vote to avoid lending it greater legitimacy, Mr. Saied now stands on slippery ground, his ability to carry out further reforms in question.

But Mr Ye and his peers are on slippery ground.

Emery has been on slippery ground before, notably last season when PSG failed to make the Champions League quarterfinals after losing 6-1 at Barcelona following a 4-0 victory at home in the first leg.

Besides, I knew that I was treading on slippery ground; that it behoved me to be careful.