permafrost是什么意思,permafrost怎么读,
英式发音:[ˈpɜːməfrɒst] 美式发音:[ˈpɜːməfrɒst]
permafrost table[地质]永冻土面
词根:permanent
adj.permanent 永久的,永恒的;不变的
adv.permanently 永久地,长期不变地
n.permanent 烫发(等于permanent wave)
permanence 持久;永久
permanency 永久;耐久性;永久的事物
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