The mason was chipping away at the rock with a hammer.
石匠用锤子一点一点地把那块石头击碎。
He was chipping away at the rock with a hammer.
他用锤子一点一点地击碎那块石头。
"We're chipping away at a very dominant competitor where market share means a lot," said Peter Higgins, a Microsoft product manager in charge of Excel.
微软公司（Microsoft）一位主管Excel的产品经理希金斯说："我们正逐渐地削弱一个首要的竞争者。在这一行业里市场占有率颇为重要。"
