head louse
collocation头虱
The school sent a note home after a case of head lice was found.
学校在发现一例头虱后给家里发了通知。
卑鄙小人；无耻之徒；蚜虫；一种小型寄生无翅昆虫,属于啮虫目。；寄生在温血动物身上的无翅吸血昆虫；卑鄙无耻的人
A small wingless parasitic insect that lives on the skin or hair of warm-blooded animals and feeds on their blood.
一种小型寄生无翅昆虫,属于啮虫目。
A small parasitic wingless insect of the order Psocodea.
寄生在温血动物身上的无翅吸血昆虫
wingless usually flattened bloodsucking insect parasitic on warm-blooded animals
卑鄙无耻的人
a person who has a nasty or unethical character undeserving of respect
吸食植物汁液的昆虫,尤指蚜虫
any of several small insects especially aphids that feed by sucking the juices from plants
The child had a louse in his hair, so the mother used a special shampoo.
孩子头发里有一只虱子，所以母亲用了特效洗发水。
用法提示：名词单数形式，指吸血昆虫。
He's a louse for spreading rumors about his colleagues.
他到处散布同事们的谣言，真是个卑鄙小人。
用法提示：名词单数形式，比喻卑鄙的人。
The gardener controlled the plant lice on the roses with neem oil.
园丁用印楝油控制玫瑰上的蚜虫。
用法提示：名词复数形式lice，指吸食植物汁液的昆虫。
较正式/文学，语气较重；指道德败坏、品行卑劣的人。
贬义，但有时带俏皮或赞赏意味；程度可轻可重。
语气远比 louse 轻，常带亲昵或玩笑色彩，不强调真正卑劣。
口语，尤指背信弃义或告密的人；比 louse 更强调背叛。
较书面/陈旧；既可指可鄙的人，也可指可怜的人，需凭语境辨析。
这里取“卑鄙无耻的人”这一义项；saint 指道德高尚、值得尊敬的人，是 louse（卑鄙小人）的常规反义词。louse 作为“虱子”或“蚜虫”的昆虫义时没有反义词。
头虱
The school sent a note home after a case of head lice was found.
学校在发现一例头虱后给家里发了通知。
体虱
Body lice are spread through close contact with an infected person.
体虱通过与被感染者的密切接触传播。
阴虱
Pubic lice are usually transmitted through sexual contact.
阴虱通常通过性接触传播。
蚜虫
The garden roses were covered in plant lice.
花园里的玫瑰上满是蚜虫。
一个十足的卑鄙小人
I can't believe you did that; you're a real louse.
我真不敢相信你做了那种事；你真是个十足的卑鄙小人。
虱子的卵，常见于讨论头虱时。
虱子叮咬引起的常见症状。
大量虱子寄生在身体或毛发上的状态。
用于梳理头发并去除虱子及其卵的工具。
头虱主要寄生的部位。
搞砸，弄糟
Don't louse up this opportunity; it's important.
别搞砸这个机会，它很重要。
Choose the next layer that will help you use louse with more confidence.
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Preparing Usage patterns
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Dictionary facts from ECDICT, WIKTIONARY.