sharpens

v.

（使）提高( sharpen的第三人称单数 )；（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

sharpen up使……更敏锐；认真思考

1. My pencil is blunt, could you lend me a knife to sharpen it?
   我的铅笔钝了，你能借我把刀子削一削吗？
2. Generations of urban living sharpened their wits.
   世代居住在城市里使他们磨练了才智。
3. Strikes will sharpen the country's dilemma.
   罢工将加剧这个国家的困境。

1. The soldiers sharpened up their knives.
   战士们把刀磨得锋利。
2. Jane voice sharpened as she became impatient.
   简变得不耐烦了，声音也变尖了。
3. The debate sharpened considerably.
   辩论变得相当激烈。

Motivation sharpens exogenous spatial attention
Positive feedback sharpens the anaphase switch.
Predation sharpens the adaptive peaks: survival trade-offs in sympatric sticklebacks
Activity sharpens the map during the regeneration of the retinotectal projection in goldfish
Less is more: expectation sharpens representations in the primary visual cortex
Activity sharpens the map during regeneration of the retinotectal projection in goldfish. Brain Res. 269, 29-39
Broad inhibition sharpens orientation selectivity by expanding input dynamic range in mouse simple cells.
Balanced inhibition underlies tuning and sharpens spike timing in auditory cortex.
GABAergic and glycinergic inhibition sharpens tuning for frequency modulations in the inferior colliculus of the big brown bat.
The midbrain creates and the thalamus sharpens echo-delay tuning for the cortical representation of target-distance information in t...