lumen
lumen — 名詞
- lumensingular
- lumensplural
1. a standard unit that measures the total amount of visible light a source, such a
流明
光通量的國際單位
a standard unit that measures the total amount of visible light a source, such as a lamp, a screen, or the sun, gives off in all directions
A standard 60-watt incandescent light bulb produces about 800 lumens of visible light.
一顆標準的六十瓦白熾燈泡約能發出八百流明的可見光。
[number] + lumens + of + visible light
Romi chose a desk lamp that delivers 450 lumens for reading and writing at her desk.
Romi 選了一盞能發出四百五十流明的桌燈，放在書桌上用於閱讀和寫作。
delivers + [number] + lumens
The projector in classroom 3B is rated at 3,000 lumens, bright enough for a room with windows.
3B 教室裡的投影機亮度規格為三千流明，即使在有窗戶的房間也足夠清晰。
Ishaan swapped his old bulbs for LEDs that give the same lumens while using far less power.
Ishaan 把舊燈泡換成亮度相同但用電少得多的 LED 燈泡。
The camping flashlight that Naoko bought outputs 500 lumens and lights up the path ahead for fifty meters.
Naoko 買的露營手電筒輸出五百流明，能把前方五十公尺的路都照亮。
文法句型
[number] + lumen
lumen + of + light
用法筆記
Frequently appears on light bulb packaging and projector specifications alongside wattage. The international symbol for lumen is 'lm' (e.g., 800 lm). A standard living-room lamp needs roughly 700–1,000 lumens for comfortable reading.
常見錯誤
2. the hollow passage or open space inside a tube-shaped organ or structure of the
管腔
管狀器官內部的空腔
the hollow passage or open space inside a tube-shaped organ or structure of the body, such as a blood vessel, the intestine, or a bronchial tube
If a blood clot blocks the lumen of an artery, oxygen cannot reach the heart muscle.
如果血塊堵住了動脈的管腔，氧氣就無法到達心肌。
blocks the lumen of an artery
Dr. Obi examined the lumen of the large intestine using a tiny camera on a flexible tube.
Obi 醫師用一根裝有微型攝影機的軟管來檢查病人大腸的管腔。
The narrowed lumen of the bronchial tubes made it very difficult for Harper to breathe during the asthma attack.
支氣管管腔變窄使 Harper 在氣喘發作時非常難以呼吸。
Doctors inject a special dye into the artery and watch it flow through the lumen on an X-ray video.
醫生將顯影劑注入動脈，然後在 X 光影片上觀察顯影劑流過管腔的情形。
A nurse inserts a thin catheter into the lumen of a vein to give the patient fluids.
護理師將一根細導管插入靜脈的管腔，以便為病人輸注液體。
- wall
the solid tissue that surrounds the lumen of a tube-shaped organ
文法句型
lumen + of + [body part]
[body part] + lumen
用法筆記
A technical term used mainly in anatomy, medicine, and biology. In everyday speech, words like 'inside', 'channel', or 'passage' are preferred. The term applies to any tubular structure — arteries, veins, intestines, the trachea, the esophagus, and even the tiny tubules inside a kidney.