A sharpener is a tool that makes something sharp again. The one students know first is the pencil sharpener: you put the pencil in and turn, or you press it in, and wood and lead come off in shavings until the point is fine.

A sharpener削尖工具 is a tool that makes something sharp again是指能把東西重新弄尖弄利的工具 The one students know first是學生最先認識的 is the pencil sharpener就是削鉛筆機 you put the pencil in and turn你把鉛筆放進去轉 or you press it in或用按的 and wood and lead come off in shavings木屑和筆芯屑就會削下來 until the point is fine直到筆尖變尖

There are also sharpeners for knives, scissors, and workshop tools — little gadgets, stones, or machines that put the edge back. The word is just sharpen + -er: the thing that sharpens.

There are also sharpeners for knives, scissors, and workshop tools也有給刀子、剪刀、工作坊工具用的sharpener——little gadgets, stones, or machines小工具、磨石，或機器 that put the edge back能把刀刃重新磨利 The word is just sharpen + -er這個字就是「sharpen」(使銳利)加「-er」 the thing that sharpens意思就是「使東西變利的東西」

In a classroom, 'pass the sharpener' almost always means the pencil one. In a kitchen, it is the knife one. English does not always add 'pencil' or 'knife'; you know from the room you are in.

In a classroom在教室裡 "pass the sharpener" almost always means the pencil one「把 sharpener 遞過來」幾乎都是指削鉛筆機 In a kitchen在廚房裡 it is the knife one就是指磨刀器 English does not always add "pencil" or "knife"英文不一定會加上「pencil」或「knife」 you know from the room you are in你是從自己所在的場合去判斷的