unheated line

例句：

1. 1. The unheated line is a crucial part of the construction process.
   未加热的线路是建筑过程中至关重要的一部分。
2. 2.The raw materials were unheated before being processed.
   原材料在加工前未经加热。
3. 3. The chef used unheated oil to create a unique flavor in the dish.
   厨师使用未加热的油为这道菜增添了独特的风味。