be a shark (in/at sth)
此处shark指骗子或某方面特别精明的人。
He is a shark at poker, always winning big.
他玩扑克牌是个高手（骗子），总是赢大钱。
鲨鱼
sharks — plural of shark
骗子；任何属于超目鲨形总目、具有软骨骨骼和每侧头部有5到7个鳃裂的掠食性鱼类；利用他人,通常通过欺骗、谎言、高利贷或勒索的人。；任何一类身体细长、主要为海生的肉食性鱼类,具有歪尾鳍,皮肤坚韧并覆盖细小齿状鳞片；这种动物的肉,可作为食物
a large marine fish with sharp teeth
任何属于超目鲨形总目、具有软骨骨骼和每侧头部有5到7个鳃裂的掠食性鱼类
Any predatory fish of the superorder Selachimorpha, with a cartilaginous skeleton and 5 to 7 gill slits on each side of its head.
利用他人,通常通过欺骗、谎言、高利贷或勒索的人。
Someone who exploits others, for example by trickery, lies, usury, extortion.
任何一类身体细长、主要为海生的肉食性鱼类,具有歪尾鳍,皮肤坚韧并覆盖细小齿状鳞片
any of numerous elongate mostly marine carnivorous fishes with heterocercal caudal fins and tough skin covered with small toothlike scales
这种动物的肉,可作为食物
Meat of this animal, consumed as food.
在某一领域非常出色的人。
A person that excels in a particular field.
冷酷无情、贪婪且不诚实的人
a person who is ruthless and greedy and dishonest
任何属于软骨鱼纲的鱼类,尤其是已灭绝的鲨鱼状全头类
Any fish of the class Chondrichthyes, especially an extinct shark-like holocephalian.
假装无能以赢取他人钱财的人。
A person who feigns ineptitude to win money from others.
在某些方面技艺超群的人
a person who is unusually skilled in certain ways
一种外观或运动类似于真正鲨鱼(鲨形总目)的淡水鱼；淡水鲨鱼
A freshwater fish that resembles a true shark (Selachimorpha) in appearance or movement; a freshwater shark.
一种夜蛾,学名为Cucullia umbratica
A noctuid moth of species Cucullia umbratica.
The shark is a powerful predator in the ocean.
鲨鱼是海洋中强大的捕食者。
用法提示：shark作为名词，表示鲨鱼
AI contextual example
We saw a huge shark while diving.
我们在潜水时看到一条巨大的鲨鱼。
用法提示：shark作为名词，表示鲨鱼
AI contextual example
Sharks have been around for millions of years.
鲨鱼已经存在数百万年了。
用法提示：shark作为名词，表示鲨鱼
AI contextual example
此处shark指骗子或某方面特别精明的人。
He is a shark at poker, always winning big.
他玩扑克牌是个高手（骗子），总是赢大钱。
Shark attacks are rare but can be fatal.
鲨鱼袭击虽然罕见，但可能致命。
动词shark常用于诈骗义，后接into引导的介词短语。
He sharked me into buying a fake watch.
他骗我买了一块假表。
与shark的'骗子'义同义，但swindler更正式，常用于指诈骗钱财的人。
cheat作为名词指不诚实的人，比shark更通用，不仅限于诈骗。
swindle是shark动词义的标准同义词，用法相同。
defraud更正式，常涉及法律语境。
con是口语词，与shark动词义相近但更随意。
grammar · medium
易错句子I saw shark in the ocean.
正确表达I saw a shark in the ocean.
英语中“鲨鱼”是可数名词，需要冠词a/an或定冠词the。中文没有冠词，学习者容易遗漏。改为a shark后符合语法。
grammar · medium
易错句子There are many shark in this area.
正确表达There are many sharks in this area.
英语可数名词复数需加-s或-es。中文名词无复数变化，学习者常在复数语境中忘记加-s。改为sharks后正确。
大白鲨
The great white shark is one of the most feared predators in the ocean.
大白鲨是海洋中最令人生畏的捕食者之一。
鲨鱼袭击
Shark attacks are rare but can be fatal.
鲨鱼袭击很少见，但可能致命。
鱼翅
Shark fin soup is considered a delicacy in some cultures.
鱼翅汤在某些文化中被视为美味佳肴。
高利贷者
Loan sharks often charge extremely high interest rates.
高利贷者通常收取极高的利率。
老千；打牌作弊者
He was known as a card shark who could cheat effortlessly.
他以能轻松作弊的老千而闻名。
鲨鱼缸（比喻充满激烈竞争的环境）
The startup entered the shark tank of the tech industry.
这家初创公司进入了科技行业的鲨鱼缸。
放高利贷者
He borrowed money from a loan shark and ended up in huge debt.
他向放高利贷者借钱，结果负债累累。
打牌老手（常指作弊者）
Be careful playing poker with him; he's a known card shark.
小心和他打扑克，他是个有名的牌场老手。
（电视节目等）开始走下坡路
Many fans think the show jumped the shark after the main character left.
许多粉丝认为该剧在主角离开后就开始走下坡路了。
鲨鱼！
In the 1975 film Jaws, Chief Brody yells 'Shark!' when he first sees the great white shark approaching the beach.
在1975年的电影《大白鲨》中，布罗迪警长第一次看到大白鲨靠近海滩时大喊“鲨鱼！”
鲨鱼饵！
In Finding Nemo (2003), Dory warns Marlin by saying 'Shark bait!' as they are chased by a shark.
在2003年的电影《海底总动员》中，多莉在被鲨鱼追赶时警告马林说“鲨鱼饵！”
Dictionary facts from ECDICT, WIKTIONARY.