1. look sharp : 赶快；
2. as sharp as a razor : 厉害的, 机警的；
形容词
副词
1. 锋利的;锐利的
A sharp point or edge is very thin and can cut through things very easily. A sharp knife, tool, or other object has a point or edge of this kind.
2. 尖的;有尖角的
You can describe a shape or an object as sharp if part of it or one end of it comes to a point or forms an angle.
3. 突然转向的;急转弯的
A sharp bend or turn is one that changes direction suddenly.
1. a long thin sewing needle with a sharp point
2. a musical notation indicating one half step higher than the note named