defocus
用法要点
句型搭配
defocus 常用作及物动词,后接宾语表示使某物散焦;也可作不及物动词,表示自动散焦。在技术语境中,常与设备或参数搭配。
介词用法
defocus 常与 from 连用,表示从某个焦点或目标散开;在摄影中可与 to 搭配表示散焦到某种程度。
语域说明
defocus 主要出现在技术、学术和摄影领域,属于正式用语;在日常对话中较少使用,多用于专业讨论或比喻性表达。
基础例句
I accidentally defocused the camera, so the photo turned out blurry.
我不小心让相机散焦了,所以照片拍出来很模糊。
During the meeting, he defocused from the main topic and started talking about unrelated things.
会议期间,他从主要话题上散开注意力,开始谈论无关的事情。
You can defocus the background to make the subject stand out more in your photos.
你可以让背景散焦,使主体在照片中更加突出。
高级例句
In optical microscopy, defocus is often used to enhance contrast in phase-contrast imaging.
在光学显微镜中,散焦常用于增强相衬成像的对比度。
The laser system can be adjusted to defocus the beam for wider coverage in material processing.
激光系统可以调整以使光束散焦,从而在材料加工中获得更广的覆盖范围。
To avoid cognitive overload, the trainer advised defocusing from minor details and concentrating on key concepts.
为避免认知过载,培训师建议从次要细节上散开注意力,集中关注关键概念。
高频搭配
verb
adjective
noun
adverb
preposition
phrase
常见错误
defocus 作不及物动词时,常与 from 连用表示从某事物散开;直接接宾语可能不自然,应添加介词或调整句型。
defocus 是动词,描述状态时应用过去分词 defocused 作形容词;原形动词不能直接作表语,需改为分词形式。
近义词辨析
blur
blur 泛指使变得模糊或不清晰,用途更广,包括视觉、记忆或界限;defocus 特指从焦点散开,更强调光学或注意力方面的专业过程。
The motion blurred the image (强调运动导致的模糊) vs. He defocused the lens intentionally (强调故意调整焦点)。
distract
distract 指分散注意力,通常由外部因素引起;defocus 在比喻中可指主动或被动地使注意力从焦点散开,更中性且常用于技术语境。
Noise distracted him from his work (外部干扰) vs. She defocused her attention to avoid stress (主动调整注意力)。