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These strata are the product of those billions and billions of shells.
這些地層就是它們無數(shù)的外殼構(gòu)成的。
Thanks to them, the carbon drained from the atmosphere,and other life-forms could develop.
因為有了它們 碳從大氣層中排出其他生物才能得以發(fā)展。
It is life that altered the atmosphere.
生命改變了大氣層。
Plant life fed off the sun's energy, which enabled it to break apart the water molecule...and take the oxygen.
植物靠太陽能存活。這能量使植物分離水分子并釋放出來氧氣。
And oxygen filled the air.
空氣因而充滿氧氣。
The Earth's water cycle is a process of constant renewal.
地球的水不斷更新循環(huán)。
Waterfalls, water vapor, clouds,rain, springs,rivers, seas, oceans, glaciers.
瀑布 水蒸氣,云、雨、泉,河流、海洋、冰川。
The cycle is never broken.
這個循環(huán)從未間斷。
There's always the same quantity of water on Earth.
地球的水量恒久不變。
All the successive species on Earth have drunk the same water.
歷來的生物都喝同樣的水。
The astonishing matter that is water.
水是令人驚嘆的物質(zhì)。
One of the most unstable of all.
是最不穩(wěn)定的一種。
It takes a liquid form as running water, gaseous as vapor...or solid as ice.
它可以是液態(tài)的流水。氣態(tài)的蒸汽或是固態(tài)的冰。
In Siberia, the frozen surfaces of the lakes in winter...
在西伯利亞 冬季結(jié)冰的湖面。
contain the traces of the forces that water deploys when it freezes.
蘊含著水在結(jié)冰時展現(xiàn)的力量。
Lighter than water, the ice floats,rather than sinking to the bottom.
冰比水輕因而浮于水面不會沉到湖底。
It forms a protective mantle against the cold,under which life can go on.
它形成御寒的保護(hù)罩。冰下的生命可以延續(xù)。
The engine of life is linkage.
生命的引擎連鎖結(jié)合。
Everything is linked.
一切都連結(jié)起來。
Nothing is self-sufficient.
沒有東西是自給自足的。
Water and air are inseparable, united in life and for our life on Earth.
水和空氣不可分割,為了地球上的生命而結(jié)合。
