detect
detect — 動詞
1. to become aware of something that is hard to see, hear, or notice because it is
察覺；辨別
注意到不明顯或隱藏的事物
to become aware of something that is hard to see, hear, or notice because it is not obvious or is intentionally kept from view.
Eliska detected a hint of sadness in her friend's voice during the phone call.
Eliska 在電話中察覺到朋友語氣裡帶有一絲悲傷。
detect + emotion in voice/speech
In the old photograph, the detective detected a small figure standing near the back door.
在那張舊照片中，偵探辨別出後門附近站著一個小小的身影。
Even by dim light, Hugo detected a crack in the wall behind the sofa.
即使光線微弱，Hugo 仍察覺到沙發後方的牆壁有一道裂痕。
Baraka detected that his colleague was nervous from the way she kept tapping her pen.
Baraka 察覺到同事很緊張，因為她不停用筆敲桌面。
The teacher detected a note of worry in the student's question about the final exam.
老師從學生關於期末考的問題中察覺到一絲擔憂。
文法句型
detect + noun phrase
detect + that-clause
detect + wh-clause
用法筆記
This sense focuses on becoming aware of subtle cues — a tone of voice, a faint smell, a small change in appearance. The subject is usually a person, but the object is always something non-obvious.
常見錯誤
2. to find or identify the presence of something by using technical devices, sensor
探測；檢測
用儀器或科學方法發現存在
to find or identify the presence of something by using technical devices, sensors, or laboratory procedures.
The hospital's new scanner can detect tumours at a very early stage.
醫院的新掃描儀能在非常早期階段偵測到腫瘤。
detect + medical condition with scanner
Scientists detected traces of heavy metals in the river water near the factory.
科學家在工廠附近的河水中檢測到重金屬的痕跡。
The security system detected movement in the corridor at two in the morning.
安全系統在凌晨兩點偵測到走廊有動靜。
Using a sensitive microphone, the research team detected sounds from deep inside the ice.
研究團隊使用靈敏的麥克風探測到冰層深處傳來的聲響。
No radioactive material was detected at the site during the final safety check.
在最後的安全檢查中，該場地未檢測到任何放射性物質。
文法句型
detect + noun phrase
be detected + prepositional phrase
can/could detect + noun phrase
用法筆記
Very common in passive constructions and with 'can/could' to describe what a device or system is capable of finding. The subject is typically a machine, instrument, or scientist, and the object is a measurable substance, signal, or phenomenon.