时间: 2025-04-24 05:50:11
美: [sil]
英: [sil]
n. 密封；印章；海豹；封条；标志
vt. 密封；盖章
vi. 猎海豹
n. (Seal)人名；(英)西尔
最后更新时间:2025-04-24 05:50:11
词源分析：该单词源于古英语“seolh”，与古德语“selha”有关，均指海豹。动词“seal”源于拉丁语“signare”，意为“标记、印章”。
历史背景：在古代，seal不仅用作标记个人身份的工具，还被广泛用于法律文书。其首次记录可以追溯到公元前约500年。
课本：在**的英语教材中，seal通常出现在初中或高中阶段的阅读理解部分。在牛津和美国的教材中，seal可能出现在小学到高中阶段的自然科学或社交研究课程中。
正式与非正式语境：
特殊场合：在法律领域，seal 作为名词指代印章或封印，用于证明文件的合法性；在科学领域，seal 也可以指代某些密封的设备或容器。
The seal was basking on the rocks.
海豹在岩石上晒太阳。
Please seal the bag tightly to keep the food fresh.
请将袋子封紧以保持食物的新鲜。
The official document was sealed with a wax stamp.
官方文件用蜡印封好了。
The researchers used a special seal to prevent leaks.
研究人员使用了特殊的密封装置以防止泄漏。
The seal of approval from the committee ensured the project’s success.
委员会的认可印章确保了项目的成功。
同义词：
反义词：
通过以上分析，可以更深入地理解和记忆单词“seal”的含义及用法。
[V-T] When you seal an envelope, you close it by folding part of it over and sticking it down, so that it cannot be opened without being torn. 封 (信封)
例：He sealed the envelope and put on a stamp.他封好信封，贴了张邮票。
例：Write your letter and seal it in a blank envelope.写好你的信，然后将其封入一个空信封。
[V-T] If you seal a container or an opening, you cover it with something in order to prevent air, liquid, or other material from getting in or out. If you seal something in a container, you put it inside and then close the container tightly. 封 (容器、开口); 将 (某物) 封入 (某容器中)
例：She filled the containers, sealed them with a cork, and stuck on labels.她装满那些容器，用塞子封了口，然后贴上了标签。
例：A woman picks them up and seals them in plastic bags.一位女士拣起它们，然后把它们封入各塑料袋中。
[N-COUNT] The seal on a container or opening is the part where it has been sealed. (容器、开口等) 封了的部分
例：When assembling the pie, wet the edges where the two crusts join, to form a seal.捏合馅饼时，弄湿两块面皮封合的边缘，以形成一个封口。
[[oft N 'on' n]] A seal is a device or a piece of material, for example, in a machine, which closes an opening tightly so that air, liquid, or other substances cannot get in or out. (机器上防止气体或液体渗入或露出的) 密封装置
例：Check seals on fridges and freezers regularly.定期检查冰箱和冰柜的密封装置。
[[oft N 'on' n]] A seal is something such as a piece of sticky paper or wax that is fixed to a container or door and must be broken before the container or door can be opened. (封条、封蜡等) 封口物
例：The seal on the box broke when it fell from its hiding-place.盒子从隐藏处掉下时上面的封口破了。
[N-COUNT] A seal is a special mark or design, for example, on a document, representing someone or something. It may be used to show that something is genuine or officially approved. 印章
例：...a supply of note paper bearing the presidential seal.…一批盖有总统印章的便条纸。
[V-T] If someone in authority seals an area, they stop people entering or passing through it, for example, by placing barriers in the way. 封锁 (某地区)
例：The soldiers were deployed to help paramilitary police seal the border.这些士兵们被调去协助准军事警察封锁边境。
[PHRASAL VERB] Seal off means the same as . 封锁 (某地区)
例：Police and troops sealed off the area after the attack.警察和军队在袭击发生后封锁了该地区。
[[书面]] To seal something means to make it definite or confirm how it is going to be. 确定
例：McLaren are close to sealing a deal with Renault.麦克拉伦即将和雷诺尔特达成一笔交易。
例：A general election will be held which will seal his destiny one way or the other.一场将左右他命运的大选即将举行。