sharpening
['ʃɑ:pənɪŋ]
n.
磨快;
磨尖;
磨刀;
削尖;
v.
（使）提高( sharpen的现在分词 );
（使声音）变得尖锐;
（使）变得更好（或技术更高、更有效等）;
（使）变得锋利;
例句:
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This "self-sharpening" helps them bore into armor.
来自SA
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This knife needs sharpening.
这把刀需要磨了。
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The contradictions are sharpening.
矛盾正在加剧.
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He cut his finger while sharpening a pencil.
他削铅笔时把手指割破了.
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Sharpening the curved blade with professional sweeps of the whetstone.
来自A. Higgins
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I can hear the budget cutters sharpening their knives already!
来自SA