n.
a relative position or degree of value in a graded group
同义词：gradelevel
any one of two or more competitors who tie one another
a worker who ties something
同义词：tier up
something that is used for tying
"the sail is fastened to the yard with tiers"
one of two or more layers one atop another
"tier upon tier of huge casks"; "a three-tier wedding cake"
Ediacaran epifaunal tiering
Interbank tiering and money center banks
Composite ichnofabrics and tiering of burrows
Tiering in suspension-feeding communities on soft substrata throughout the phanerozoic
Cost Effective Storage using Extent Based Dynamic Tiering.
Phanerozoic development of tiering in soft substrata suspension-feeding communities
Taphonomic tiering: experimental field taphonomy of molluscs and foraminifera above and below the sediment–water interface
Evaluating phase change memory for enterprise storage systems: a study of caching and tiering approaches
The spectral sensitivities of identified receptors and the function of retinal tiering in the principal eyes of a jumping spider
Application instantiation based upon attributes and values stored in a meta data repository, including tiering of application layers...
