表示磨杵成针的英文单词
“磨杵成针”对应的英文单词有：grind a mortar into a needle、little strokes fell great oaks、an iron pestle can be ground down to a needle ，一共3个，具体意思及用法如下：
grind a mortar into a needle磨杵成针
little strokes fell great oaks磨杵成针
an iron pestle can be ground down to a needle磨杵成针