The migration test environment will need to be representative of the post-migration environment and will require a number of servers; two is a minimum.

迁移测试环境需要成为后来环境的代表，并需要大量的服务器；两台是最低值。

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You will need to set up a migration test environment for this purpose.

出于这个目的考虑，您需要创建一个迁移测试环境。

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If LDAP is to be used in the production environment, it is essential that it be included in the migration test environment.

如果产品环境中使用的是LDAP的话，那么将其包含到迁移测试环境的话，就非常重要。

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Behind this environment are the great social processes of migration and modernization that produced that new urban form, the metropolis.

在这种环境背后是移民和现代化的重大社会进程,所带来的新的城市形式，即大都市。

耶鲁公开课 - 现代诗歌课程节选

Propagation and migration often involve reading data files and sensing the environment.

CNN: Technology - Analysis: Understanding viruses