be a sucker for
collocation对……毫无抵抗力；容易被……吸引
She's a sucker for romantic movies.
她对浪漫电影毫无抵抗力。
吸盘；根出条；萌蘖枝；吸吮者；吃奶的幼畜；吸吮器具；吸管；用吸盘附着的动物（如章鱼、鮣鱼）
a person who is easily deceived or taken advantage of
吸吮的人或动物,尤其是哺乳动物,未断奶的幼兽
A person or animal that sucks, especially a breast or udder; especially a suckling animal, young mammal before it is weaned.
容易上当受骗的人
a person who is gullible and easy to take advantage of
从灌木或树的根部或下干长出的不需要的枝条,尤其是嫁接植物或树的根茎
An undesired stem growing out of the roots or lower trunk of a shrub or tree, especially from the rootstock of a grafted plant or tree.
从植物根部长出的芽
a shoot arising from a plant's roots
寄生虫；食客
A parasite; a sponger.
用嘴吸饮料的人
a drinker who sucks (as at a nipple or through a straw)
进行吸附的器官或身体部位,尤其是一些昆虫、青蛙和章鱼身体上的圆形结构,使它们能够粘附在表面上
An organ or body part that does the sucking; especially a round structure on the bodies of some insects, frogs, and octopuses that allows them to stick to surfaces.
通过吸取某物而工作的东西
A thing that works by sucking something.
泵的活塞或桶；也指泵篮的阀门
The embolus, or bucket, of a pump; also, the valve of a pump basket.
用于抽取物质的管道
A pipe through which anything is drawn.
一小块通常为圆形的皮革,中心附有一根绳子,浸水后按压在光滑表面上,由于大气压力而粘附,可以用绳子提起相当重的物体；以前儿童用作玩具
A small piece of leather, usually round, having a string attached to the center, which, when saturated with water and pressed upon a stone or other body having a smooth surface, adheres, by reason of the atmospheric pressure, with such force as to enable a considerable weight to be thus lifted by the string; formerly used by children as a plaything.
如章鱼和吸盘鱼等动物,利用此类器官附着在其他物体上
An animal such as the octopus and remora, which adhere to other bodies with such organs.
北美和东亚的鲤科鱼类,嘴部改造成向下的吸盘状结构,以便在底部沉积物中觅食
Any fish in the family Catostomidae of North America and eastern Asia, which have mouths modified into downward-pointing, suckerlike structures for feeding in bottom sediments.
Don't be a sucker; always double-check a salesperson's claims.
别当冤大头；对销售员的话要多加核实。
用法提示：sucker 是名词，指容易上当受骗的人。
The street seller spotted the suckers in the crowd and raised the price.
街头小贩看出人群里有几个好骗的人，于是抬高了价格。
用法提示：suckers 是 sucker 的复数形式，仍表示容易受骗的人。
She felt like a sucker when she realized the online deal was fake.
当她发现那个网上交易是假的时候，觉得自己像个傻瓜。
用法提示：sucker 作名词，在句中是“傻瓜、易上当者”的意思。
较正式，强调被骗的结果，常指骗局的受害者；语气比 sucker 少一点贬义。
非正式，侧重愚蠢轻信，语气比 sucker 更粗鲁。
强调容易被说服或影响，不一定是因为愚蠢或被骗，更多指性格上的软弱点。
与'sucker'的'易受骗者'义项相对，指习惯于质疑、不轻易相信他人的人。
与'sucker'的'易受骗者'义项相对，指因怀疑他人动机而不易上当的人。
对……毫无抵抗力；容易被……吸引
She's a sucker for romantic movies.
她对浪漫电影毫无抵抗力。
把某人当傻瓜耍
Don't try to play me for a sucker—I know exactly what you're doing.
别想把我当傻瓜耍——我完全知道你在干什么。
稳输的赌局；傻瓜才下注的赌局
That investment plan is a sucker bet.
那个投资计划是一场必输的赌局。
容易上当的人比比皆是；傻瓜随时都有
He actually believed the email scam — there's a sucker born every minute.
他居然相信了那封诈骗邮件——真是随时随地都有傻瓜。
根蘖；根出条
The root sucker needs to be cut away from the tree.
需要把这棵树长出的根蘖剪掉。
suck（吸）+ -er（表人或物的后缀）
骗子设下骗局，目标正是容易上当的sucker。
sucker常因轻信而沦为骗局的受害者。
骗子（con artist）专门利用sucker的轻信行骗。
欺诈行为往往以sucker为对象，骗取金钱或利益。
sucker容易被欺骗，所以常被不法分子盯上。
出其不意的重拳；暗算
The boxer lost the fight after a sucker punch in the third round.
这位拳击手在第三回合被一记冷拳击中，输掉了比赛。
必输的赌注；骗人的赌局
He thought he could win, but the whole game was a sucker bet.
他以为自己能赢，但整个赌局都是一个骗人的陷阱。
对…毫无抵抗力；特别喜爱
I'm a total sucker for romantic comedies.
我对浪漫喜剧毫无抵抗力。
每分钟都有一个容易受骗的人出生。
Don't be a sucker—check the facts before you pay.
别当冤大头——付钱之前先核实事实。
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Dictionary facts from ECDICT, WIKTIONARY.