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be a pest
He is such a pest.
他真是个讨厌鬼。
害虫；有害动物
先理解核心含义，再看它在真实句子里的用法。
害虫；有害动物
a destructive insect or other animal that attacks crops, food, livestock, etc.
He is such a pest.
他真是个讨厌鬼。
指对农作物、食物等造成破坏的昆虫或动物
攻击农作物或牲畜的破坏性昆虫；农业害虫
Any destructive insect that attacks crops or livestock; an agricultural pest.
鼠疫:由鼠疫耶尔森菌引起的严重啮齿动物传染病,经跳蚤叮咬传播给人类
a serious (sometimes fatal) infection of rodents caused by Yersinia pestis and accidentally transmitted to humans by the bite of a flea that has bitten an infected animal
讨厌的人,麻烦事
An annoying person, a nuisance.
任何高死亡率的流行病
any epidemic disease with a high death rate
The garden is full of pests like aphids and caterpillars.
花园里满是蚜虫和毛虫之类的害虫。
That kid is such a pest; he keeps interrupting the class.
那个孩子真是个讨厌鬼，他一直在课堂上插嘴。
We need to find a way to control the pest infestation in the basement.
我们需要想办法控制地下室的害虫侵扰。
He is such a pest.
他真是个讨厌鬼。
The garden is full of pests of various kinds.
花园里满是各种害虫。
Not this
There are many pest in the garden.
Use this
There are many pests in the garden.
pest指害虫时为可数名词，需用复数形式pests。
Not this
He is pest.
Use this
He is a pest.
pest指讨厌的人时为可数名词，需加不定冠词a。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
害虫防治
We need to call an expert for pest control.
我们需要请专家进行害虫防治。
害虫侵扰
The warehouse suffered from a severe pest infestation.
仓库遭受了严重的害虫侵扰。
清除害虫
Farmers use various methods to get rid of pests.
农民使用各种方法清除害虫。
常见害虫
Cockroaches are a common pest in many cities.
蟑螂是许多城市的常见害虫。
害虫种类
This region has identified several invasive pest species.
这个地区已识别出几种入侵性害虫种类。
小讨厌鬼
That little pest keeps interrupting our conversation.
那个小讨厌鬼一直打断我们的谈话。
使自己成为讨厌的人
He made a pest of himself by constantly asking questions.
他不停地问问题，使自己成了个讨厌鬼。
诅咒（某人）
A pest on him for breaking my window!
该死的他打破了窗户！
令人讨厌
The little boy is a pest because he never listens.
那个小男孩从不听话，真惹人烦。
你真是个讨厌鬼！
In The Good, the Bad and the Ugly, Tuco calls a character a pest.
在电影《黄金三镖客》中，图科称某角色为讨厌鬼。
别烦人了！
In The Simpsons, Homer tells Bart to stop being annoying.
在《辛普森一家》中，荷马告诉巴特不要烦人。
Use Pest naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
看到pest（害虫），想起“拍死它”！
通常指令人讨厌的人或害虫，常用于日常口语和非正式文体；表示鼠疫时则为正式或医学用语，比较少见。
可数名词，指令人讨厌的人或物；表示鼠疫时不可数。常与of连用，如a pest of insects。
Dictionary facts from ECDICT, WIKTIONARY.