1·He started to sharpen his knife.
他开始磨刀。
—— 《柯林斯英汉双解大词典》
2·Here is a knife to sharpen your pencil, my dear boy.
孩子，这儿有把小刀可以削你的铅笔。
3·We need to sharpen up this knife.
我们需要打磨这把小刀。
4·You'll have to sharpen the knife, it is blunt.
你的小刀钝了，你要磨砺一下。
5·My pencil is blunt, could you lend me a knife to sharpen it?
我的铅笔钝了，你能借我把刀子削一削吗？ 㢵。
6·My pencil is blunt, could you lend me a knife to sharpen it?
我的铅笔钝了，你能借我把刀子削一削吗？
7·No one knows from which day and which year on he began to sharpen the knife. In the beginning, no one even knew why he did it.
没人记得他是从哪一年的哪一天开始磨的刀，开始也没有人知道他为什么要磨刀。
8·When I came into the room, my 5-year-old daughter was struggling with a knife to sharpen her pencil.
我进屋的时候，我5岁的女儿正费劲地用小刀削铅笔呢。
9·If you have a knife or rock, take out a small chunk to leave a sharp Angle. Then, use your knife or rock to further sharpen the TAB's point.
如果你手头有小刀或石头，把拉环割掉一小块，形成锋刃，再继续打磨它的尖端。
10·In Thailand, they still sharpen knives against stones, and it's a skill you have to learn: how not to ruin the knife as you're sharpening it.
在泰国，人们仍然用沙石磨刀。怎样在磨刀时不损坏它，是一门需要学习的技能。