A tier is composed of a number of server groups.

层由一些服务器组组成。

youdao

A surprisingly high number of people believe that Cloud Storage is synonymous with disk, primarily performance disk, or Tier-1 disk, and deduplication.

云存储是磁盘、高性能磁盘或Tier - 1磁盘和重复数据删除的代名词。抱有这种想法的人很多，并还达到了一个惊人的数量。

youdao

If the application also USES tier information or Geohash information, then these values can be used for better narrowing down the number of documents to search.

如果应用程序还使用层信息或Geohash信息，那么可以使用这些值来更好地缩小需要搜索的文档的范围。

youdao

For the coming year, even as we have reduced the number of economic migrants overall by seven thousand, we have actually increased the number of Tier 2 visas available.

BBC: In full: David Cameron immigration speech

Currently their main obstacle is the unwillingness of cable operators to put a network of interest to only a fraction of their viewers on a tier available to a broad number of their subscribers.

WSJ: Comcast Ordered to Carry Tennis Channel More Widely

The number of visas issued to skilled non-EU migrants without job offers - known as tier 1 - would be cut by 13, 000 to 1, 000, and the corresponding number of visas issued to those with job offers - known as tier 2 - would increase by 7, 000 to 20, 700, Mrs May explained.

BBC: May unveils plan to reduce non-EU immigration