This was to occur with progress in the development of the steam engine.

这是随着蒸汽机的发展进步而发生的。

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After couple of years of development, the PHP team will release the next generation of the PHP engine with many new language feature, such as namespaces and closures.

经过数年的开发，PHP团队将发布下一代的php引擎，其中包含很多新的语言特性，例如名称空间和闭包。

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Serving as a script execution engine, it can automate a wide variety of development activities, including test automation, Web deployments, application migrations, and installations.

作为脚本执行引擎，它可以将各种各样的开发活动自动化，包括测试自动化、Web 部署、应用程序移植，和安装。

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Recycling is also an engine of economic development.

ECONOMIST: Making states accountable

The trend towards more twin-engined aircraft drives up the cost of engine development, by boosting the need for power and reliability.

ECONOMIST: Aircraft engines

Mosley believes this will slow down the rate of engine development.

BBC: SPORT | Motorsport | Formula One | F1 changes to be revealed