a large sea fish with very sharp teeth and a pointed fin on its back. There are several types of shark, some of which can attack people swimming. 鲨鱼 
a fatal shark attack 致命的鲨鱼袭击 The boat went down in shark-infested waters off the coast of South Africa. 这艘船在有大量鲨鱼出没的南非海岸附近水域沉没。 The dark shapes of half a dozen sharks circled beneath the boat. 五六条鲨鱼的黑影在船下打转。
Oxford Collocations Dictionaryadjective- killer
- man-eating
- attack somebody
- bite somebody
- feed
- …
- attack
- fin
- tooth
- …
- (informal, disapproving)
a person who is dishonest in business, especially somebody who gives bad advice and gets people to pay too much for something 坑蒙拐骗的人；诈骗者
Word Originsense 1 late Middle English: of unknown origin.sense 2 late 16th cent.: perhaps from German Schurke ‘worthless rogue’, influenced by shark, the animal.
Idioms
jump the shark
(used especially about a television series, etc.) to include something that is very hard to believe as an attempt to keep people watching, usually a sign that the show is not as good as it used to be 鲨鱼： （尤其是在电视连续剧等中使用的）鲨鱼，其中包括一些很难让人信服的内容，通常是表明该节目不如以前那样好的迹象Has the show finally jumped the shark? 这档节目为刺激收视，最终加入荒诞不经的内容了吗？