The label field in this extension is optional.

这个扩展中的标签域是可选择的。

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The following table details each field of an extension mapping and how to complete them.

下表详细描述了扩展映射的每个字段以及如何填充它们。

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David's work in the field of life extension began after his wife's terrifying diagnosis.

知道了他妻子可怕的诊断后，大卫开始了他在生命延伸领域上的工作。

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Under the Life Extension Programs, weapons are returned from the field and aging components are refurbished or remanufactured.

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"This technology should provide an opportunity to see parts of the field even down to the leaf level, " said Phil Hamm, director of the Hermiston Agricultural Research and Extension Center at Oregon State University.

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