To develop a new internal fixator and new method for four-corner arthrodesis.

目的研究一种新的用于四角融合的内固定器械和方法。

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The four-corner systems each will include sensors, the user display, and navigation units.

这种四角系统中每个角都将包括传感器、用户显示器和导航单元。

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The complications of operation can be avoided and the rate of four-corner arthrodesis will improve according to the data.

按照测量数据进行腕骨四角融合术，可避免并发症，提高四角融合率。

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After four -- after four great contests, in every corner of this country, we have the most votes, the most delegates, and the most diverse coalition of Americans that we've seen in a long, long time.

CNN: Obama speech: 'Yes, we can change'

The defender was on hand to convert Brian Howard's right-wing corner with four minutes of the match remaining.

BBC: Leicester 1-2 Reading

But with two porous defences on display, there was always a chance of another before half-time and it came from the head of Steven Taylor who powered in a left-wing corner from four yards.

BBC: West Brom 2-3 Newcastle