气候变化是人类面临的共同挑战。
Climate change is the common challenge faced by the mankind.
答：气候变化问题是全人类面临的重大挑战。
A: the issue of climate change is a major challenge facing the entire human race.
当今世界，人类仍然面临着许多严峻的挑战。
In today's world, mankind remains confronted with many severe challenges.
人类未来的福祉现在正面临最大的挑战。
The future of humanity's well-being is facing the biggest challenge now.
人类未来的福祉现在正面临最大的挑战。
The future welfare of human beings are facing the largest challenge.
新的世纪，人类社会面临着挑战和机遇。
The human society is facing challenge and opportunities in the new century.
气候变化是人类面临的共同挑战。
灾害是人类面临最严重的挑战。
Disaster is a serious challenge that the mankind is faced with.
气候变化是人类社会所面临的一个巨大挑战。
The climatic change is a huge challenge which the human society faces.
人类的生存环境却面临着前所未有的挑战。
Humanity's living environment is actually facing the unprecedented challenge.
许多人说到气候变化，都把它称之为人类当今面临的最大的挑战。
Many refer to climate change as the biggest challenge confronting mankind today.
人类的生存环境却面临着前所未有的挑战。
The survival of the human environment is facing unprecedented challenges.
二十一世纪的人类，正面临着全球人口问题的挑战。
In the twenty first century. The human are facing the challenge of population problems.
答气候变化问题是全人类面临的重大挑战。
The issue of climate change is a major challenge facing the entire human race.
答气候变化问题是全人类面临的重大挑战。
The issue of climate change is a major challenge facing the entire human race.
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