penciln.铅笔；笔状物vt.用铅笔写pencil ring gate[机] 雨淋式环浇口pencil of conics二次曲线束pencil sketching铅笔画pencil electrode铅笔芯电极pencil of planes面束pencil silhouette铅笔型服装,修长笔直线条服装pencil like point铅笔尖样[一种血管穿刺针尖的形状]pencil of circles圆束pencil percussion[医] 铅笔叩诊, 普累施氏叩诊, 肋间听诊pencil microphone铅笔式传声器

1. There is not a rubber in my pencilcase.
   我的铅笔盒里没有一块橡皮。