A canyon is a deep valley with very steep sides of rock, and there is usually a river at the bottom. Over a very long time the river cuts the land down.

A canyon一個canyon is是 a deep valley一個很深的山谷 with very steep sides of rock兩側是非常陡峭的岩壁， and而且 there is usually a river at the bottom底部通常有一條河。 Over a very long time經過非常長的時間， the river那條河 cuts the land down把地面往下切割。

The Grand Canyon in the United States is the one most learners picture.

The Grand Canyon in the United States美國的大峽谷 is the one most learners picture是大多數學習者腦中想到的那個。

English borrowed the word from Spanish cañón. The same Spanish word also gave English cannon, the big gun: both started from a “tube” idea — a metal tube that fires, or a huge tube of rock with a river in it.

English英文 borrowed the word from把這個字借自 Spanish cañón西班牙文的cañón。 The same Spanish word同一個西班牙字 also gave English cannon也給了英文cannon這個字，也就是大砲， the big gun： both兩者 started from都源自 a "tube" idea「管子」的概念 —— a metal tube that fires一根會發射的金屬管， or或是 a huge tube of rock with a river in it一根裡面有河流的巨大岩石管。

Though actually, in Britain people often say gorge or ravine for smaller cuts in the land, and keep canyon for the huge ones, especially in America; in American English canyon is the ordinary word. It is a normal geography and travel word, not slang.

Though actually不過其實， in Britain在英國， people常對於比較小的地形切口 often say大家常說 gorge or ravine gorge或ravine for smaller cuts in the land， and而 keep canyon for the huge ones把canyon留給非常巨大的那種， especially in America尤其是在美國的情況； in American English在美式英文裡 canyon canyon is the ordinary word是很普通的字。 It它 is a normal geography and travel word是個很普通的地理和旅遊用字， not slang不是俚語。