detect

Compared meaning: discover or become aware of something (verb).

比较义项：发现、注意到（某事物的存在）（动词）。

• find

  The most common, general word for locating something through search or effort, or simply coming across it by chance; used for concrete objects and abstract facts alike.

  最常用、最通用的词，指通过寻找或努力找到某物，或偶然遇到某物；既可用于具体物品，也可用于抽象事实。

  I searched the whole desk but still couldn't find my glasses.

  我把整个书桌都找遍了，还是找不到我的眼镜。

• detect 本词

  Implies discovering something hidden, faint, or hard to perceive, often through careful observation, instruments, or tests; more formal, common in scientific or technical contexts.

  指发现某种隐藏、微弱或不易察觉的事物，通常借助仔细观察、仪器或检测；语气较正式，常用于科学或技术语境。

  Doctors used a blood test to detect the infection early.

  医生用血液检测及早发现了这种感染。

• notice

  Means to become aware of something using your senses, usually without deliberately searching for it; often used for changes, details, or things happening around you.

  指凭感官察觉到某事物，通常不是刻意寻找的结果；常用于察觉变化、细节或周围发生的事情。

  I didn't notice any change in his mood during the meeting.

  会议期间，我没有注意到他情绪上有任何变化。

Find, detect, and notice all mean to discover something, in different ways. Find means locating something by searching, or finding it by chance. Notice means sensing something without trying. Detect means finding something hidden, often through careful observation or instruments, and sounds formal.

这三个词都表示“发现”或“注意到”某事物，但方式和语气不同：find 强调通过寻找或努力找到，也可以是偶然遇到；notice 强调凭感官不经意地察觉到；detect 强调通过仔细观察或仪器发现不易察觉的东西，语气更正式。