同根派生 grind away相关词英汉例句The steps have been ground away by the passing feet of many visitors over the centuries.這些台堦經過許多世紀衆多遊客的足踏，已經磨損。Grinding for a test; grinding away at housework.爲考試埋頭苦讀; 埋頭做家務grind away更多例句