Jazz musicians do not follow a set piece of music note by note, but make up melodies and chord changes as they play.

爵士乐手不会按照固定的乐谱一个音符一个音符地演奏，而是在演出的时候自编旋律及变化和弦。

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For two computers to communicate, you must set up a well-defined rule so that both the sender and the receiver know what to do with every piece of information.

为使两台计算机能够彼此通信，您必须设置一个定义良好的规则，以便使发送方和接收方都能了解如何去处理每一段信息。

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Log4j is easy to set up: all you need to do is supply the log4j JAR files to each piece of your application and get on with logging (see Downloading and installing log4j).

log4j很容易设置：您所需做的就是向应用程序的每个部分提供log4j JAR文件，从而开始日志记录(请参阅下载和安装log4j)。

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Barry Ferguson - who had been impressive in midfield - should have done much better when set up by the industrious Darcheville, but the Ibrox captain blasted the ball well over from a good position, before Adam passed up a set-piece from 20 yards out.

BBC: Aberdeen 2-0 Rangers

But Everton had other ideas and after they were awarded a free-kick on the edge of area, Baines stepped up to curl a delightful set-piece into Cech's top left-hand corner.

BBC: Chelsea 1-1 Everton (aet)

Much of the build-up was dominated by the anticipated advantage that England might enjoy at the set-piece, but the first engagement between the two front rows in the opening minute was a mess.

BBC: England 14-28 Australia