一级供应商：Tier One

二级供应商：Tier Two

Tier One

一级供应商;第一梯队;一线;一级资本;第一级资本

双语例句：

Tier one capital includes equity and retained earnings but also various types of hybrid debt instruments.

除了股本和留存收益，一级资本还包括各种混合债务工具。