hammering
[ˈhæmərɪŋ]
n.
锤打，锤打的声音;
v.
锤打( hammer的现在分词 );
反复敲打，连续击打（尤指发出大声）;
击败;
猛踢;
例句:
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My heart was hammering. The footsteps had stopped outside my door.
我的心怦怦直跳。脚步声已停在我的门外。
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As he said it, there was a hammering outside.
他说这话时，外面传来一阵敲打声。
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A crowd of reporters was hammering on the door.
一群记者正在砰砰地拍打着大门。
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We've been hammering away at this for a year.
来自VOA
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She had to ignore how hard her heart was hammering.
来自THETIMES
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The SEC is still hammering out its rules.
来自WSJ