This rapid zone of transition is called the upper timberline or tree line.

这种快速的过渡地带被称为“上树带线”或“林木线”。

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Above the tree line there is a zone that is generally called alpine tundra.

林木线上方有一个区域，通常被称为高山苔原。

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Concentrative sections of production, trade and living will be set up in the new zone, representing the tree major functions of industrial production, commercial and trade services and habitation.

台商工业园设立相对密集的工业区、商贸区、生活区、体现工业生产、商贸服务、生活居住等三大基本功能。

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D-shaped holes in the bark or new tree shoots emerging at the root zone of your ash trees may be a sign of infestation by the Emerald Ash Borer, an insect native to the Far East that targets ash trees, says Dave Dailey of Birchcrest Tree and Landscape, in Rochester, N.

WSJ: Getting to the Roots of Your Trees' Stress

After public pressure and leadership from a local councilman and the corps' commander, officials at several levels of government created the Los Angeles River Pilot Recreation Zone along a lush segment that features tree-lined islands, vistas of the San Gabriel Mountains and abundant wildlife such as herons, egrets, hawks and kingfishers.

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Meanwhile on Tuesday, a giant Christmas tree was lit on the southern side of the demilitarized zone, despite concerns in Seoul that North Korea could strike the position.

BBC: New South Korea exercises to test border tension