using solar radiation as a source of energy — are stromatolites, constructed by complex microbial communities, in particular cyanobacteria. I'm surrounded by fossil stromatolites.这些钙质结构是叠层石，由复杂的微生物群落构成，特别是蓝藻细菌。这
It’s common for people to lose social connections during retirement, said David Richter, a professor of survey research in the department of educational science and psychology at Freie Universität Berlin. “We have rather solid proof that...
The causes of biodiversity loss arecomplicated, but we know we are making the problems worse. 生物多样性丧失的原因或许是复杂的,但我们也无法对情况的恶化脱责。 On land, we areconvertingnaturalhabitatsinto farms, factories, roads and cities. 在陆地...
There exists a highly complex feedback loop between the use of advanced technology and changes to the environment that are only slowly becoming understood.[67] Man-made threats to the Earth's natural environment include pollution, deforestation, and disasters such as oil spills. Humans have ...
They are following the 24 Solar Terms(节气),which are an important part of Chinese culture. The 24 Solar Terms began during the ancient【3】(时期). At that time,most Chinese people made their living on farms. So weather changes were【4】(重要的)for them. No one【5】(怀疑)that they ...
62. What we call nature is, ___ , the sum of the changes made by all the various creatures and natural forces in their intricate actions and influences upon each other and upon their places. A. in common sense B. from a sense C. by the sense D. in a sense相关知识...
Aging happens to all of us, and is generally thought of as a natural part of life. It would seem silly to call such a thing a “disease.” On the other hand, scientists are increasingly learning that aging and biological age are two different things, and that the former is a key risk...
These effects include increased air pollution, changes in food and water supplies and coastal flooding.What can we do? Climate change may be a big problem, but there are many little things we can do to make a difference. If we try, most of us can do our part to reduce the amount of...
Wang Fan: We must first address the matter of responsibility.In fact, China has already shouldered our responsibilities in this matter as well as maintaining an impartial, accurate assessment of the facts, upon which we haveworked outa number of solutions. At the same time, we are also aware...
BEIJING, Jan. 6 (Xinhua) -- As changes unseen in a century are unfolding at a rapid pace, the world's seven major regions, namely the Asia-Pacific, North America, Europe, Eurasia, the Middle East, Latin America and Africa, will see a mix of tailwinds and headwinds in 2023. ...