The J2EE deployment descriptors should port between application server environments without change, as long as the supported J2EE specification level is the same.

只要所支持的 J2EE 规范级别相同，J2EE 部署描述符无需更改就可以在应用程序服务器环境之间进行迁移。

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File descriptors are low-level interfaces to input and output.

文件描述符是低层的输入和输出接口。

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For improving the level of weather forecast, a new method that weather radar echo boundaries can be recognized and tracked by Gaussian descriptors is proposed.

为了提高气象预报业务水平，特别是强对流天气的临近预报能力，提出利用高斯描绘子来进行识别和跟踪天气雷达的回波轮廓。

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