Adjective:

1. (of clothing) made in or consisting of three parts or pieces;

   "the standard three-piece business suit; jacket and trousers and vest"
   

(British English)a three-piece suite (= a set of three pieces of furniture, usually a sofa and two armchairs )

三件一套的家具（通常为一张长沙发和两张单人沙发）

a three-piece suit (= a set of clothes consisting of trousers/pants, a jacket and a waistcoat/vest )

三件式套服（包括裤子、上衣和背心）

Guthrie, Doug . Dragon in a Three Piece Suit . Princeton : Princeton Univ. Press, 1999.

《穿着三件式西装的巨龙》, 普林斯顿: 普林斯顿大学, 1999年.

This lightweight, easy to wear classic rectangle style has a rimless three piece mount construction.

这款轻巧, 易磨损的经典风格有一个长方形无框三片贴装结构.

A three piece suite has two chairs and a sofa.

三件一套的家俱有两把椅子和一个沙发.

Choose a three piece suite on hire purchase in a range of fucking fabrics.

选择用分期付款买回同系列的什么织物做的三套件西装.

Many shapes are parts of a two or three piece finished form.

两三个部分的多个形状零件组成的的成品.