1
seal sth
及物动词，直接接宾语。
She sealed the envelope before mailing it.
她在邮寄前封好了信封。
密封；封住
sealed — past of seal
先理解核心含义，再看它在真实句子里的用法。
密封；封住
make something tight or closed so that air, liquid, etc. cannot get in or out
She sealed the envelope before mailing it.
她在邮寄前封好了信封。
使紧密；防止泄漏
make tight; secure against leakage
用封条封住
close with or as if with a seal
不可逆转地决定
decide irrevocably
seal
Base
原形
seals
3rd person
第三人称单数
sealing
-ing
现在分词
sealed
Past
过去式
sealed
Past participle
过去分词
She seals the envelope before mailing it.
她在邮寄前封好信封。
He sealed the jar with wax.
他用蜡封住了罐子。
They have sealed the deal.
他们已经达成了协议。
密封；封存
She sealed the envelope before mailing it.
她在寄信前封好了信封。
The plumber used a special tape to seal the pipe joint.
水管工用特制胶带密封了管道接头。
The treaty was sealed with a handshake between the leaders.
该条约以领导人之间的握手告竣。
及物动词，直接接宾语。
She sealed the envelope before mailing it.
她在邮寄前封好了信封。
表示用某种材料或工具封住。
He sealed the letter with wax.
他用火漆封住了信。
短语动词，意为‘封锁’，常接地点名词。
Police sealed off the crime scene.
警方封锁了犯罪现场。
短语动词，强调完全封住。
Make sure to seal up the bag properly.
确保把袋子封好。
Not this
Please seal up the envelope before mailing.
Use this
Please seal the envelope before mailing.
汉语中常说‘密封’，但英语动词 seal 本身就表示‘封闭’，加上 up 是冗余，应去掉 up。
Not this
The document was sealed with the official stamp.
Use this
The document was sealed by the official stamp.
介词 with 表示工具时通常用于被动语态中强调手段，但 seal 作为动词，被动语态后接 by 引出施动者更自然；此处官方印章是施动者，应用 by。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
敲定交易；达成协议
They sealed the deal with a handshake.
他们握手敲定了交易。
封信封
She sealed the envelope before mailing it.
她在寄出前把信封封好了。
密封容器
Make sure you seal the container tightly to keep the food fresh.
一定要把容器密封好，以保持食物新鲜。
封锁边界
The government decided to seal the border to stop the spread of the disease.
政府决定封锁边界，以阻止疾病蔓延。
决定命运；使成为定局
The last decision sealed the fate of the company.
最后一个决定决定了公司的命运。
锁住味道；保留风味
Seal in the flavor by browning the meat first.
先把肉煎上色，以锁住味道。
敲定交易，最终达成协议
We shook hands to seal the deal.
我们握手成交。
注定某人的命运（通常指厄运）
The final mistake sealed his fate.
最后那个错误注定了他的命运。
我一定守口如瓶
Don't worry, my lips are sealed.
别担心，我会守口如瓶的。
我会每天在信里给你我全部的爱，以吻封缄。
This line is from Bobby Vinton's 1962 hit song 'Sealed with a Kiss'.
这句歌词出自博比·文顿1962年的热门歌曲《Sealed with a Kiss》。
我们守口如瓶。
This line is from the Go-Go's 1981 hit song 'Our Lips Are Sealed'.
这句歌词出自The Go-Go's乐队1981年的热门歌曲《Our Lips Are Sealed》。
发长 /iː/ 音 (如 sea, tea)
Same pattern, same sound
Use sealed naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
想象把缝隙用蜡封死，像'sea'(海)一样滴水不漏，决定就此定局。
语域：neutral 常见场景：容器或包装封口、信件或文件封口、法律或协议最终确定 作动词时多用于表示‘密封、封住’或‘使……成为定局’，日常和书面场合都比较常见；在法律、合同等正式语境中，书面色彩更明显。
及物动词意为'封闭、盖印'，不及物动词意为'猎海豹'（较少用）
Dictionary facts from AI_FALLBACK, DICTIONARY_API_DEV, ECDICT, WORDNET.
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