Menstruation (a period) is a major stage of puberty in girls; it's one of the many physical signs that a girl is turning into a woman.
月经（例假）的来到是女孩青春期中经历的一个重要阶段；它是女孩变为女人的众多生理变化之一。
The underlying characteristics of the real-time Web, however, are defining the next major stage of the Internet and will spread throughout its infrastructure in years to come.
但是即时网络的基本特征将在未来几年定义互联网的下一个大时代。
Per capita public green area of 7 square metres, green cover 30.02% zone, urban greening, presence and beautification of a major stage.
人均公共绿地面积达7平方米，建成区绿化覆盖率30.02%，城市的绿化、亮化、美化上了一大台阶。
Per capita public green area of 7 square metres, green cover 30.02% zone, urban greening, presence and beautification of a major stage.
人均公共绿地面积达7平方米，建成区绿化覆盖率30.02%，城市的绿化、亮化、美化上了一大台阶。
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