查词历史：
- grindstone
n.
- 复数： grindstones
1.
N-COUNT
磨石；砂轮 A grindstone is a large round stone that turns like a wheel and is used for sharpening knives and tools.
- Noun
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1. a revolving stone shaped like a disk; used to grind or sharpen or polish edge tools
- 1. A knife is sharpened on the grindstone;steel is tempered in fire.
- 刀在石上磨，钢在火中炼。
来自《简明英汉词典》
- 2. I will take exams in two weeks, so I'm keeping my nose to the grindstone just at the moment.
- 我两星期后要考试，因而眼下正埋头苦读。
来自《简明英汉词典》
- 3. Take the sickle which is lying on the grindstone.
- 把磨刀石上的那把镰刀拿去。
来自《简明英汉词典》
