primary pulp

例句：

1. 1. The primary pulp is used to make paper.
   初级浆料用于制作纸张。
2. 2. The primary pulp was extracted from the tree.
   初级浆料是从树上提取的。
3. 3.The primary pulp is a crucial component in the papermaking process.
   初级浆料是造纸过程中至关重要的成分。