“笔尖”的英语？

铅笔的一段细成笔尖.The pencil tapers to a sharp point.这笔尖坏了, 使不得了.The nib is broken, it can't be used.这就是笔尖断了的那枝笔.This is the pen whose point is broken....

“笔尖”的拼音为：bǐ jiān...