中国自20世纪60年代开始进行海洋油气资源的自营勘探和开发。（）
中国自20世纪60年代开始进行海洋油气资源的自营勘探和开发。（）
翻译：It is no use telling grown-up children not to make mistakes, both because they will not believe you, and because mistakes are an essential part of education.
翻译：Driving southward from Cairo into the valley, I entered a landscape that owed little to the present era.
翻译：World War II was more complex than World War I, which was a collision among the imperialist powers over the spoils of market, resources and territories.