triangular framing的用法和样例：
例句
- An instrument consisting of an upright, open triangular frame with usually46 strings of graded lengths played by plucking with the fingers.
竖琴一种有一个通常系有四十六根长短不一的琴弦的直立的开放三角架、弹奏时用手指拨动琴弦的乐器 - A triangular frame for arranging billiard balls at the start of a game.
排放球的三角架在台球比赛之前用来排放球的三角架
