That forms the snowline, which occurs at different heights around the planet depending on climate.

这使雪线得以形。地球上各处的雪线高度有所不同是依据气候所致的。

It's the only one of its family that could live above the snow line.

这是鹦鹉家族中唯一能生活在雪线之上的品种。

Above the snow line, glacier lakes are all covered with pure white snow all year round.

雪线处，是一座座雪皑皑的冰湖。

They form above the snowline, or the lowest elevation where there’s ice and snow all year round.

它们形在雪线之上，或者是全都有冰雪的最。

But only the carbonaceous chondrites contain water - as well as lots of carbon, if you couldn't tell from their name.

你从它的名称中也可以得知它们带有很多的碳， 它们之所以带有水是因为它们是在太阳的雪线以外形的。 此外它们的水中带有的氘的比例。

Secondly, the mountain lies near the tropics, so the snowline is high, and the glaciers relatively small, barely big enough to widdle it down.

其次，这座山位于热带附近，所以雪线较高，且冰川相对较小，不太可能大到把它冲下来。

As the snow line retreats further and further up these peaks, there is less and less space for wildlife, and that is a challenge for one of the most majestic of all mountain creatures.

雪线向山峰处退去，野生动植物的生存空间日益减少，恶化的条件威胁着一种美丽山地动物的生存。

But at rare intervals warm rains and warm winds invade the mountains and push back the snow line from 2000 feet to 8000, or even higher, and then come the big floods.

但偶尔会有暖雨和暖风侵入山区，将雪线从 2000 英尺推回 8000 英尺，甚至更高，然后发生大洪水。