have hollow legs
...ice skates were made from leg bones of horse, ox or deer, and were...modern ice skate blade, unlike the blade of a knife, has a crescent-shaped hollow, creating two sharp edges on each...
... a fierce predator that walked on two powerful legs. This meat-eater had a huge head with large, pointed, replaceable teeth...solidly built but its bones were hollow.
...old-fashioned a person who cannot use their arms or legs in a normal way 2010-03-29 02:52:05 補充： ＜regulation＞ an official rule or the act...