1. The stadium has several tiers of seats.
体育场有几层座位。
2. They are organized into different tiers of management.
他们被组织成不同的管理层级。

A: How many tiers are there in this building?
A：这栋建筑有几层？

B: There are three tiers of rooms.
B：这里有三层房间。

1) 等级或阶层

2) 层或排

3) 分层

1. 等级；阶层；层

e.g.
The cake was made in several tiers.
蛋糕是由好几层组成的。

noun

1. one of a series of levels, rows, or layers arranged one above another or one behind another

Synonym: level, layer, stratum