There are several hypotheses, including warming or cooling of Earth, changes in seasonalfluctuations or ocean currents, and changing positions of the continents.
有几种假说,包括地球变暖或变冷,季节波动或洋流的变化,以及大陆位置的变化。
2
The seasonalfluctuations about infectation percentage and the harm on the Corbicula fluminea were compared.