To make calculations manageable even by computers, most of the models suppose either that the oceans are a motionless swamp or that they don't exist at all.
In the former software cost management, the cost estimation methods have some problems, such as subjective experience 's effect, uncertain estimation and so on.
As a kind of abnormal phenomena, mirror movement occurred after both stroke and Parkinson s disease, and influence the rehabilitation prognosis was uncertain.
Recent evidence favors a rival to the long-standing theory that the Americas were colonized 11,000-12,000 years ago by people migrating south from Beringia along a midcontinental ice-free corridor.