vt.

1. 展开，摊开；打开
   I unfolded the letter and read it.

   我打开信读了起来。

2. 显露；表露；呈现
   She unfolded to him her plan for the future.

   她向他表露她未来的计划。

vi.

1. 展开；展示
2. 显露；呈现
   A beautiful view unfolded before us.

   我们面前呈现出一派美丽景色。

v.

1. open or spread out from a folded position.
2. reveal or be revealed.