美国现代总统制度的发展始于安德鲁·杰克逊，他于1829年以民主党领袖的身份掌权，一直任职到1837年。

The development of the modern presidency in the United States began with Andrew Jackson who swept to power in 1829 at the head of the Democratic Party and served until 1837.

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学者们抛弃了500年的传统制图法，绘制出了惊人的图像。

Academics came up with the startling images after throwing away 500 years of conventional cartography.

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可伸缩性的传统制约因素是对 CPU、内存和 I/O的访问。

The traditional limiting factors for scalability are access to CPU, memory, and I/O.

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