Seasonal factors, such as the rainy season, along with population movements in the area contribute to this unusually high incidence of cholera.
雨季等季节性因素以及该地区的人口流动造成这一极不寻常的霍乱高发病率。
2
Seasonal factors, with a particularly heavy rainy season, along with increased population movements in the area contribute to this unusually high incidence of cholera.
强降雨雨季等季节性因素以及该地区增多的人口流动造成这一极不寻常的霍乱高发病率。
3
There is little seasonal variation in the incidence of the disease.