1. Prewriting is an essential step in the writing process to generate ideas and organize them effectively.

预写是写作过程中的一个必要步骤，用于产生想法并有效地组织它们。

2. Before starting the essay, the student spent some time on prewriting, brainstorming different topic ideas and creating an outline.

在开始写作之前，学生花了一些时间进行预写，集体讨论了不同的话题想法并制定了大纲。