A sierra is a row of mountains with sharp peaks, like the teeth of a saw if you look at them from far away. That is why Spanish speakers used their word for a saw, and English borrowed it. It is not one mountain; it is the jagged line of many.

A sierra Sierra 是is a row of mountains with sharp peaks一排有尖銳山峰的山脈，like the teeth of a saw就像鋸子的鋸齒一樣 if you look at them from far away如果你從遠處看的話。That這 is why就是為什麼 Spanish speakers西班牙語使用者 used用了 their word for a saw他們指鋸子的字，and而 English英語 borrowed it把它借了過來。It它 is not不是 one mountain一座山；it它 is而是 the jagged line of many很多座山連成的鋸齒狀山線。

You meet it in place names, such as the Sierra Nevada, and in geography writing. In everyday English it is a little literary — a weather report might just say “the mountains.” Though actually, a lot of English speakers meet Sierra first as a girl’s name, a car, or the radio-alphabet word for the letter S.

You你 meet it會遇到這個字 in place names在地名裡，such as像是 the Sierra Nevada內華達山脈，and還有 in geography writing在地理寫作裡。In everyday English在日常英語裡 it它 是有點 is a little literary文謅謅；a weather report一則天氣報告 might just say可能就只會說 "the mountains"「那些山」。Though actually不過事實上，a lot of English speakers很多說英語的人 meet Sierra first最先遇到Sierra這個字 as a girl's name是當作女生的名字，a car一款車，or或 the radio-alphabet word無線電字母裡代表S的詞 for the letter S。

Those are other uses. This word, here, is the saw-tooth mountains.

Those那些 are是 other uses其他的用法。This這個字 word，here在這裡，is指的是 the saw-tooth mountains鋸齒狀的山脈。