1
scan sth
及物动词，表示扫描某物。
She scanned the document.
她扫描了文件。
扫描；浏览；细看
scanning — present participle of scan
先理解核心含义，再看它在真实句子里的用法。
扫描；浏览；细看
to examine or look at something quickly or carefully
She scanned the document.
她扫描了文件。
依次仔细或批判地检查；审视；细看。
To examine sequentially, carefully, or critically; to scrutinize; to behold closely.
环顾寻找；快速浏览。
To look about for; to look over quickly.
用扫描仪对某物成像。
To create an image of something with the use of a scanner.
用电子设备读取。
To read with an electronic device.
scan
Base
原形
scans
3rd person
第三人称单数
scanning
-ing
现在分词
scanned
Past
过去式
scanned
Past participle
过去分词
I scan the document every day.
我每天扫描文件。
She scanned the QR code yesterday.
她昨天扫描了二维码。
They are scanning the room for bugs.
他们正在扫描房间寻找窃听器。
规则动词
The doctor used a CT scan to examine the patient's brain.
医生用CT扫描检查病人的大脑。
She scanned the document quickly to find the key information.
她快速浏览文件以找到关键信息。
The scanner scans each page and saves it as a PDF.
扫描仪扫描每一页并保存为PDF文件。
及物动词，表示扫描某物。
She scanned the document.
她扫描了文件。
不及物动词，与for连用表示扫描以寻找某物。
The radar scanned for incoming missiles.
雷达扫描寻找来袭导弹。
名词，指对某物的扫描检查。
A scan of the brain revealed no damage.
脑部扫描显示没有损伤。
介词短语，表示在扫描过程中。
The tumor was detected on a routine scan.
肿瘤在常规扫描中被发现。
Not this
The doctor scanned the patient carefully to check for injuries.
Use this
The doctor examined the patient carefully to check for injuries.
“scan” 作为动词常指快速浏览或使用扫描仪，而这里表达的是详细的医学检查，应使用 “examine”。
Not this
I did scan on my computer for viruses.
Use this
I did a scan on my computer for viruses.
“scan” 作名词时是可数名词，表示一次扫描操作，前面需要加不定冠词 “a”。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
扫描文档
Please scan the document and email it to me.
请扫描文档并发送邮件给我。
扫视房间
He scanned the room for any familiar faces.
他扫视房间寻找熟悉的面孔。
CT扫描
The doctor ordered a CT scan to check for injuries.
医生安排CT扫描检查伤势。
快速浏览
I gave the report a quick scan before the meeting.
会议前我快速浏览了报告。
扫视房间
He scanned the room to see if anyone was watching.
他扫视房间，看看是否有人在看。
眺望地平线
The captain scanned the horizon for land.
船长眺望地平线寻找陆地。
扫描搜索
The software scans for viruses automatically.
该软件自动扫描病毒。
扫描生命形态。
The science officer scanned the planet for signs of life.
科学官扫描了这个星球寻找生命迹象。
Use scanning naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
想象扫描仪scanner，去掉er就是动作scan：扫描。
语境：医疗扫描、技术文档扫描、快速阅读。语气：中性到正式。注：scan 作名词多用于医疗和技术领域，比较正式；作动词时在“快速浏览”义项上较口语化，在“扫描”义项上较正式，整体偏中性。
动词可及物或不及物；名词可数。常用介词搭配：scan for（扫描寻找）, scan through（快速浏览）
Dictionary facts from ECDICT, WIKTIONARY.