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
英文释义
v make sharp or sharper
v make crisp or more crisp and precise
v become sharp or sharper
v put (an image) into focus; we cannot enjoy the movie"
v make (images or sounds) sharp or sharper
v raise the pitch of (musical notes)
v give a point to
v make (one's senses) more acute