今天我们来看这样一个句子: Indeed,if you take baby tree swallows out of a nest for an hour (feeding half the... [查看全文]
今天我们来看这样一个句子: The fact that some societies domesticated animals and plants, discovered the use of... [查看全文]
今天我们来看这样一个句子: 这个句子看似不长,但有点抽象,看看大家能不能一遍或两遍就能看懂。 One of the most difficul... [查看全文]
今天我们来看这样一个句子: 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]
今天我们来看这样一个句子: While these records provide broadly consistent indications that temperature variations... [查看全文]
今天我们来看这样一个句子: 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]
今天我们来看这样一个句子: 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]