| 释义 |
Naismith's rule
Naismith's rule (ˈneɪsmɪθs) n (Mountaineering) mountaineering a rule of thumb for calculating the time needed for a climbing expedition, allowing 1 hour for every 3 miles of distance plus 1 hour for every 2000 feet of height[C19: named after W. W. Naismith (1856–1935), Scottish climber, who formulated it] |