Take the sickle which is lying on the grindstone.把磨刀石上的那把镰刀拿去.A knife is sharpened on the grindstone; steel is tempered in fire.刀在石上磨, 钢在火中炼.He sharpened the edge of his knife on a grindstone.他在磨石上磨快了他的刀刃....

grindstones的音标：...

n.磨石( grindstone的名词复数 )，砂轮，持续辛勤地工作，努力不懈...

grindstone的复数形式为：grindstones...

n.磨石，砂轮，持续辛勤地工作，努力不懈...

A knife is sharpened on the grindstone; steel is tempered in fire.刀在石上磨, 钢在火中炼.A knife is sharpened on the grindstone;steel is tempered in fire.刀在石上磨,钢在火中炼。He sharpened the edge of his knife on a grindstone.他在磨石上磨快了他的刀刃....

If students keep their noses to the grindstones, they won't fail the course.如果学生一刻不停地拼命干, 他们就不会不及格....

grindstone的音标：grindstone的英式发音音标为：['graɪndstəʊn]grindstone的美式发音音标为：['graɪndstoʊn]...