You can take a cue from GCC: maintain many sets of environment variables per application and switch from one pool to another depending on the work at-hand.

您可以从 GCC 得到提示：为每个应用程序维护多个环境变量集，并根据手头的工作从一个集合切换到另一个集合。

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Over the years, Tim Joseph's partners have helped many dairy farmers to switch to grass-fed.

多年来，蒂姆·约瑟夫的合作伙伴已经帮助许多奶农改用草料喂养。

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Many dairy farmers were persuaded to switch to grass-fed when they saw its advantage in terms of profits.

当许多奶农看到牧草喂养在利润方面的优势后，他们就被说服改用牧草喂养了。

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This momentary switch-off between the sun and the poet is just one of this poem's many substitutions.

这种太阳和诗人之间,短暂的互换只是这首诗众多替换中的一个。

耶鲁公开课 - 弥尔顿课程节选

Seiden thinks that if Schering can ramp out Clarinex before springtime of 2002--next year's hayfever season--they can switch many patients over.

FORBES: Dog Watch: Schering-Plough

Despite his improved poll ratings, Mr Sharon's victory in those is far from assured: a lot can happen before then, and loyalties will switch many times.

ECONOMIST: Disasters avoided, for now | The

These benefits depend on how many consumers switch between the two firms when one of them cuts prices (the diversion ratio).

ECONOMIST: Economics focus