Islanders have campaigned for the abolition of one of the three tiers of municipal power on the island.

岛民们已经发起了运动，要废除该岛3级市政权力中的1级。

《柯林斯英汉双解大词典》

In its most basic form, this architecture can be broken down into three tiers: front, mid, and database.

按照最基本的形式，这个体系结构可以分为三层：前端层、中间层和数据库层。

youdao

Figure 1 shows a simplified view of the three tiers and some of their components.

图1展示了一个描绘这三层和一些组件的简化视图。

youdao

Slacker has three complementary service tiers, from the entirely free Slacker Basic Radio and the ad-free Slacker Radio Plus to the on-demand access of Slacker Premium Radio.

ENGADGET: Slacker now streaming six ESPN stations, Radio and Deportes amongst them

Where 3rd-generation Core graphics were divided into two tiers, the new generation is focused on three, two of which are built for performance over efficiency.

ENGADGET

Of these, arguably the most important and certainly the most innovative, are sanctions in each of the three tiers that would affect China's ability to garner billions in undisciplined and largely non- transparent funding from the U.S. capital markets.

CENTERFORSECURITYPOLICY: Center For Security Policy