| 单词 | naismiths-rule |
| 释义 | Naismith's rule in British English (ˈneɪsmɪθs) noun 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 Word origin C19: named after W. W. Naismith (1856–1935), Scottish climber, who formulated itDefinition of 'Naismith's rule' |
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