[size=3]A critical factor that plays a part in susceptibility to colds is age.
[size=3]A critical factor that plays a part in susceptibility to colds is age.
年龄是人们是否易患感冒的一个重要因素。
[size=3]A critical factor that plays a part in susceptibility to colds is age.
年龄是人们是否易患感冒的一个重要因素。