今天我們來看這樣一個句子: Indeed,if you take baby tree swallows out of a nest for an hour (feeding half the... [查看全文]
今天我們來看這樣一個句子: The fact that some societies domesticated animals and plants, discovered the use of... [查看全文]
今天我們來看這樣一個句子: 這個句子看似不長,但有點抽象,看看大家能不能一遍或兩遍就能看懂?! ne of the most difficul... [查看全文]
今天我們來看這樣一個句子: Ceramic products also include lead-glazed tomb models of the Han dynasty, three-color... [查看全文]
Others have blamed extinction on competition from the mammals, which allegedly ate all the dinosaur eggs--excep... [查看全文]
今天我們來看這樣一個句子: While these records provide broadly consistent indications that temperature variations... [查看全文]
今天我們來看這樣一個句子: Over long periods of time, substances whose physical and chemical properties change ... [查看全文]
The importance of olfactory communication (using odors to communicate) in the way of life of deer was documen... [查看全文]
今天我們來看這樣一個句子: The possibility that mass extinctions may recur periodically has given rise to such... [查看全文]
For example, in traditional architecture, stone or brick walls served a structural role, but in a steel-beam ... [查看全文]