protasis

例句：

1. 1. The protasis of the play is a scene where the main character meets his future wife.
   戏剧的前奏是主要角色遇见他未来妻子的场景。
2. 2. In ancient Greek mythology, the protasis was the beginning of the story before the gods intervened.
   在古希腊神话中，前奏是故事开始之前，诸神介入。
3. 3. The protasis of the speech is the introduction to the main points that will be discussed later.
   演讲的前奏是对稍后将讨论的主要观点的介绍。