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time 2 (03:52)
rebounding whale populations are good for ocean ecosystems. At first, scientists suspect that the growing of whale population will decrease the population of other species. However, the drop in whale population leads to the decrease in other species in the sea. Which indicate that the whales provide some nutrients for other species. In addition, there are some kind of whales migrate for nutrients
time3 (01:52)
Whales are really good for marine ecosystems, since their carcasses provide lots of organic materials for other animals in the sea. However, people have killed many species of whales. It is significant that whales could change the structure and function of deep-sea ecosystems, which is vital to the whole earth environment.
time 4(01:54)
people rather suffer physical pain than the boredom. Research has found that nearly half of the anticipates don’t like being alone in a room without any distraction, and a more comfortable and familiar environment cannot improve this situation.
time 5(02:00)
Most people cannot enjoy the moment by themselves, so that they would rather suffer some physical pain. Positive people would think of the future and the loved one while stressful people think of works. It is vital for us to control our mental thoughts, we could train our brain in some small break in daily life to release the stress through self thinking.
time 6(01:40)
Scientists took a video of a high mountain flower to observe the process how the birds expend flowers’ bellow. |
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