The main contents of this paper are model design of a virtual camera, property research to controlled movement, potential visible surface sets reduction and interactive rendering technology.

其内容涉及虚拟相机的概念设计，受控运动的特性研究，潜在可见表面集的缩减技术和交互式演示技术。

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UBL has a lot of promise, but after three years of work it still just scratches the surface of the range of document and transaction sets needed to cover electronic business needs.

UBL有很多承诺，但是经过三年的研究之后，它仍然仅仅触及到满足电子商务需求所需要的大量文档和事务的皮毛。

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The lathe is mainly used for machining shaft, plate, sets and other has turned the workpiece surface, and machinery factory is engaged in the most widely used kind of machine tool.

车床主要用于加工轴、盘、套和其他具有回转表面的工件，是机械制造和修配工厂中使用最广的一类机床加工。

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But it's not just the bounce and speed of the ball off the clay surface that sets it apart from other courts, and makes the French Open an elusive tournament for some players.

CNN: Tennis interactive: Why clay is so different

Sometimes, the touchpad provides direct access to radio pre-sets, with preset numbers lighting up and showing through its translucent surface.

FORBES: 2012 Audi A7 Test Drive and Review - High-Tech Meets High Style

The straight sets win came on the British no 1's least favourite surface of clay, and followed fellow Briton Greg Rusedksi's defeat on Monday.

BBC: Henman impressive on clay