pencil (EN)

名词，动词

名词 “pencil”

1. 铅笔
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   She drew a beautiful landscape using only a pencil.
2. 光束（在光学中，指在一点会聚或从一点发散的光线束或光线集合）
   The scientist observed a pencil of light emerging from the prism.
3. 束（在几何学中，具有共同性质的一组几何对象，例如通过同一点的直线）
   In mathematics class, we studied the pencil of lines that pass through a single point.

动词 “pencil”

1. 用铅笔写或画
   She penciled a quick note in her journal before leaving.