For example, you can try to measure how hard it is to spin this sheet of paper about an axis that is in the center of it.

比如，试着让一张纸绕其中心轴旋转，看看有多困难。

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When you drag and drop the HTTP Methods activity from the palette, its property sheet will display the list of REST services and feeds that are registered in the IBM Mashup Center.

在从面板拖放此 HTTP Methods 动作后，其 property 表将会显示在 IBM Mashup Center 内注册的 REST 服务和提要的列表。

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Armstrong signed the flight plan sheet and gave it to the head of NASA's public information office while he was quarantined at the Johnson Space Center after returning to Earth.

阿姆斯壮在返回地球后，在詹森太空中心被隔离时，签署了这份飞行计划表，交给太空总署新闻办公室的主管。

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Seeing the drawing in person, one is confronted with its fragility and physicality: The sheet comprises two pieces of paper, glued together with a strip that runs right through the center.

WSJ: Masterpieces on a Shopping List | Michelangelo Master Drawings | Museum of Fine Arts Boston | By Cammy Brothers