How to create a marker only drawable into the bounds of the circle area?

如何创建一个标记只冲成圆的面积范围？

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Each morning use sunscreen cream to smear a square and a circle area on the back of one's hands.

每天早上用防晒霜在自己的一只手背涂一个方块，在另一只上涂一个圆。

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Download this brushed metal texture and select Elliptical Marquee Tool to select the circle area.

下载这个拉丝金属质感，并选择椭圆选框工具，选择圆的面积。

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Many of these spots are in places like Columbia Heights (where Meridian Pint is located), the U Street Corridor, Logan Circle and the area around the convention centre, once ignored by highly-educated professionals who demand good food, nightlife, arts and all the other things that make city life worth living.

BBC: Neighbourhood spots in the nation's capital

In Navevo's case the data will be used to flash a warning symbol on its sat-nav maps when a driver approaches a "warning zone" with a 50m (164ft) radius circle drawn around the area.

BBC: Navevo sat-nav offers cyclist alerts to lorry drivers

His family said he was well-known around the area and had a big circle of friends who were "absolutely devastated" by his sudden death.

BBC: Tribute to Cumbria crash driver Billy Parker