Even so , the snails need traction to move across the slippery surface .
尽管如此,这些螺还是需要在光滑平面上运动的牵引力。
Slippery surfaces sometimes would cause a lizard to lose its footing as it jumped , potentially sending it head over heels .
当鬣蜥起跳时,光滑的表面有时会使它失去立足点,可能会使它的头部超越脚部。
At high speed in slippery bends they provide only a few square centimetres of contact with the road , yet they help a driver steer safely around the corner .
To speak of a land of enchantment , even in reference to a contemporary novel , is to conjure up images of elves , moonbeams and slippery mountains .
谈论一个魔幻之地,即使是在一部当代小说中,也会让人在脑海中浮现出精灵、月光和光滑的群山等图像。
The legs , which are slightly curved , resemble those of insects , with tiny hooks on the tips of their feet to provide enough friction to enable movement in a slippery environment .
What if the slippery mr obama , his head brimming with arcane incumbent 's knowledge about pakistan and other tricksy stuff , runs circles around the tongue-tied texan ?