Life on land probably began about 430 million years ago, though it has existed in the water for perhaps as much as 3,000 million years. When we think of the first thing on land, we probably think of strange animals coming out of the oceans, but in fact no animals could have been liv...
6.HOW LIFE BEGAN ON THE EARTH No one knows exactly how the earth began,as it happened so long ago.However,according to a (76)widelyaccepted theory,the universe began with a"Big Bang"that threw matter in all (77)directions.After that,atoms began to form and combine to create stars and...
aWang Mei autograph Wang Mei题名[translate] aLife on land probably began about 430 million years ago,though it has existed in the water for perhaps as long as 3000 million years. 生活在土地大概开始了大约430百万年前,或许,虽然它在水中存在了为,只要3000百万年。[translate]...
How did we get from those primitive beginnings to the vast diversity we see today? In this lesson we'll cover both the origin and history of life on Earth, taking you on an exciting adventure through time. Conditions on Early Earth If you took a trip back in time to when the Earth ...
jellyfish: Gelatinous marine animals with tentacles, known for their stinging cells and ethereal appearance. Portuguese man-of-war: A marine hydrozoan known for its potent sting and distinctive air-filled float that allows it to drift ...
1.I’ll find a way to improve on my own so that I can make the team next-year.(so that引导目的状语从句)我会找到方法来自我提高以便于明年加入足球队。 2.I’m a bit worried about keeping up with the other students in my advanced course, and it’ll be quite difficult to get used to...
swoon. As We worked on; but the water increasing in the hold, it was apparent that the ship would founder; and though the storm began to abate a little, yet it was not possible she could swim till we might run into any port; so the master continued firing guns for help; and a ...
Life began in the ocean(海洋). They are home to about two million species(物种), from the largest animal that has ever lived on the Earth to the smallest one. New species are found all the time, as scientists say that 91%of ocean species have yet to be found or described. ...
Those who know Farrell describe him as a quintessential workaholic, often spending many hours in machinery and innovation. When asked about his unwavering dedication, he reflects on the words of a mentor: "If you do what you love, you'll never work a day in your life." This philosophy has...
Prebiotic systems chemistry suggests that high phosphate concentrations were necessary to synthesise molecular building blocks and sustain primitive cellular systems. However, current understanding of mineral solubility predicts negligible phosphate conc