In the high sierras there is not much oxygen in the air .

在很高的山峰上，空气中没有多少氧气。

As far as the sierras and abandoned gold mines .

直至山脉和废弃的金矿。

Sierras subandinas : the samples were found in north-west argentina

安第斯支脉地区：这些样品是在阿根廷西北部发现的。

Conservationist john muir visited this meadow many times and praised it highly calling it the " gem of the sierras " .

自然资源保护者约翰缪尔曾多次造访这片草地而且高度赞扬其为“内华达山脉的最佳之处”。

Mrs. roberts : coats jackets the weatherman said the weather should be clear , but we may see some snow in the sierras .

罗伯特太太:大衣外套呢气象播报说应该是晴天,但是在sierras会下雪.我们有链条吗。