sharp  
 adjective uk/ʃɑːp/ us/ʃɑːrp/
  (ABLE TO CUT)               
 B1 锋利的;尖的
having a thin edge or point that can cut something or make a hole in something
  a knife with a sharp edge/blade. 刀刃锋利的刀子 
 sharp teeth/claws/fingernails 锋利的牙齿/尖利的爪子/尖尖的指甲 
 The point of this pencil isn't sharp enough. 这支铅笔的头还不够尖。 
 C2 (疼痛)迅速而剧烈的
producing or describing a quick, strong pain that makes you feel like you have been cut
  She nudged me with a sharp elbow, to tell me to be quiet. 她狠狠地用肘捅了我一下,要我安静点。 
 I have this sharp pain in my chest, doctor. 医生,我的胸口感到刺痛。 
  (脸上某部位)尖尖的
used to describe a part of someone's face that is very pointed
  a thin face with a sharp nose 长着尖尖鼻子的一张瘦脸 
  (言行)尖刻的,尖锐的,严厉的
If someone is sharp or makes a sharp statement, they speak or act in a severe and angry way that can hurt other people.
  He was a little sharp with me when I asked him to help. 我请他帮忙时,他对我的态度相当刻薄。 
 The proposals came in for some sharp criticism. 提议遭到了尖锐的批评。 
 - More examples
- The doctor used a sharp instrument to dig a piece of glass out of my finger.
- Careful with that open tin - it's got a very sharp edge.
- File down the sharp edges.
- Shopkeepers are not supposed to sell knives and other sharp implements to children.
- I felt a sharp pain and looked down to see blood pouring from my leg.
  (SUDDEN)      
 B2 突然的;急剧的;猛烈的
happening suddenly, quickly, and strongly
  a sharp drop in temperature 气温的急剧下降 
 a sharp decline in the standard of living 生活水平的骤降 
 a sharp rise/increase in the number of cases of the disease 该病发病人数的急剧上升 
 a sharp bend in the road 公路的急转弯 
 to suffer a sharp blow to the head 头部遭到一记猛击 
 - More examples
- A sharp tap on the knee usually causes an involuntary movement of the lower leg.
- She gave me a sharp jab in the ribs with her elbow to stop me from saying any more.
- She pulled the bush out of the ground with a sharp jerk.
- The latest crime figures show a sharp rise in burglaries.
- Investors should not expect a sharp upturn in the economy.
  (TASTE)      
  很酸的
sour in taste
  Lemons have a sharp taste. 柠檬的味道很酸。 
 This cheese is rather sharp. 这种奶酪很酸。 
 Synonym: acid (CHEMICAL)
   (CLEAR)      
 C1 清晰的;清楚的
clear; easy to see or understand
  This TV gives a very sharp picture. 这台电视机图像非常清晰。 
 The mountains stood in sharp contrast to the blue sky. 群山与蓝天形成了鲜明的对比。 
 There is a sharp distinction between crimes which involve injury to people and those that don't. 造成人身伤害的犯罪和未造成人身伤害的犯罪之间界线分明。 
 It was a sharp reminder of how dangerous the world can be. 这清楚地提醒人们这个世界有多么危险。 
   (CLEVER)      
 B2 mainly approving聪明的;精明的;敏锐的 
intelligent or quick to notice things
  Birdwatchers need to have sharp ears and eyes. 观鸟者必须有敏锐的耳朵和眼睛。 
 She has a sharp eye for a bargain. 她非常善于发现便宜货。 
 Our new director is very sharp. 我们的新主任非常精明。 
 She manages to combine a sharp mind/intellect with a sympathetic manner. 她既有机敏的头脑,又能做到善解人意。 
 He was a man of sharp wit/sharp-witted man who always spoke his mind. 他是一个思维敏捷、说话从不拐弯抹角的人。 
 The play was full of sharp one-liners. 这出戏充满了机智风趣的俏皮话。 
US He may be old but he's still as sharp as a tack. 他可能是上年纪了,但仍然思维敏捷。 
   (FASHIONABLE)      
 informal时髦的,时尚的 
fashionable
  Tony is a very sharp dresser. 托尼衣着很时尚。 
 a sharp-suited business executive 衣着时髦的企业主管 
 Idiom   
have a sharp tongueidiom (also be sharp-tongued) 说话尖刻,有一张刀子嘴
to be someone who often criticizes and speaks in a severe way
  Jane has a sharp tongue, so be warned. 小心点,简说话很刻薄。 
 sharp  
 adverb uk/ʃɑːp/ us/ʃɑːrp/
  (SUDDENLY)      
 C1 突然地,立刻地
suddenly or immediately
  After the church, turn sharp left/right. 过了教堂,向左/右急转弯。 
   (EXACTLY)      
C1 正好,准时地
exactly at the stated time
  The performance will start at 7.30 sharp. 演出将于7:30准时开始。 
 sharp       
 adjective, adverb uk/ʃɑːp/ us/ʃɑːrp/
 (音)偏高(的),升半音(的)
higher than the correct or stated musical note
  The E string on my guitar is a bit sharp. 我吉他上 E 弦的音有些偏高。 
 This concerto is in the key of C sharp (= the set of musical notes a semitone higher than the one based on the note C). 这支协奏曲是升C调的。 
 to sing sharp 唱得偏高 
 Compare: flat adjective adverb (MUSIC)natural adjective (MUSIC)
 sharp      
noun [ C ] uk/ʃɑːp/ us/ʃɑːrp/
 升半音;升半音号
(a symbol for) a note that is a semitone higher than the stated note