The next four lines restrict the movement of the mouse to the maximum distance from the center in each dimension.

接下来的四行代码将鼠标移动限制为从每个维度中心移动的最大距离。

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Finally, the mouse position is reset to the center if the aforementioned threshold of movement has not been reached.

最后，如果没有达到上面提到的移动阈值，则将鼠标位置重置到中心。

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The extensive system has allowed the city to phase out much car traffic in its center, while preserving the efficient movement of people from the city center to outlying regions.

这套覆盖面广泛的公交系统将逐步让大部分汽车交通退出市中心，同时确保人员能迅速有效地从城市中心转移的城外偏远地区。

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He is in fact the center of everything for the whole Taliban movement in Pakistan and in the tribal area, including Swat.

VOA: standard.2009.06.18

At the center of the movement was the black church, which had, as Aldon D.

NEWYORKER: Small Change

As the exhibition encourages viewers to explore through photographs of Alfred Stieglitz's elegant installations, the center of this movement was Stieglitz's gallery, 291, where the great impresario and photographer regularly presented the latest aesthetic challenges by the avant-garde on both sides of the Atlantic.

WSJ: Americans' African Inspiration | African Art, New York, and the Avant-Garde | Metropolitan Museum of Art | By Michael FitzGerald

Just over half of Italians that voted cast their ballots in favor of either the center right alliance of former Prime Minister Silvio Berlusconi or the Five Star Movement of former comedian Beppe Grillo.

NPR: Italy Pays More To Borrow After Election Turmoil