permafrost怎么读，permafrost什么意思，permafrost短语和例句

1.Permafrost is defined as any ground that has stayed below freezing for more that two consecutive summers.

多年冻土是指任何连续两个夏天处于冰点以下的地面。

2.The boreal forest will creep northwards, for example, as the permafrost thaws and carbon fertilisation increases.

例如，随着冻土融解，二氧化碳增多，针叶林将继续北移。

3.Not in the center. It is full of lakes, rivers and low vegetation resting on permafrost.

中心地区山不多.那里湖泊河流密布.低矮的植物生长在永久的冻土上.

4.Their roots don't grow very deep, so the permafrost doesn't interfere with their growth.

它们的根长得不深，所以永久冻土不会影响它们的生长。

5.Permafrost Photo: Dentren at en.wikipedia / cc – by – sa 3.0

多年冻土图片：Dentren at en.wikipedia /cc –by –sa 3.0

6.As the permafrost melts, the land loses its capacity to absorb water.

由于冻土融化，陆地会失去吸水性。

7.The answer may be that virtually all the water on Mars is now locked in the permafrost layer under the surface, with more contained in the planet's polar caps.

答案可能是，现在火星上几乎所有的水都被锁在地表下的永久冻土层中，更多的水被包含在这个星球的极地冰帽中。

8.The permafrost contains immense amounts of frozen organic matter that have been accumulating for millennia.

永久冻土层经过千万年的累积形成，其中包含了巨量的冻僵的有机物。