Present in or produced by nature:
a source of danger; a possibility of incurring loss or misfortune
Organization of American States
serve as a guide
to estimate or calculate in advance
The property or condition of occurring at frequent intervals.
belonging to the science that deals with climate and their phenomena
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An entity that when applied to a mass causes it to accelerate. Sir Isaac Newton's Second Law of Motion states: the magnitude of a ...
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南斯拉夫
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