Event objects are left in the global window object.

事件对象留在全局的window对象中。

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When the browser calls them, the this variable points at the global window object.

当浏览器调用它们时，this变量指向全局的window对象。

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It does this by painting a global window of a specified color and then removing it, causing all subsequent Windows to repaint.

它通过绘画的全球窗口指定的颜色，然后删除它，导致所有后续窗口重画。

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Container traffic provides a window on trade patterns and the state of the global economy because it is the most closely tied to consumer demand.

FORBES