HSK 7-9
灯泡
dēngpào名
light bulb; see also 电灯泡; third-wheel or unwanted third party spoiling a couple's date (slang)
客厅的灯泡突然不亮了。
Kè tīng de dēng pào tū rán bú liàng le.
The living room light bulb suddenly went out.
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Appears across levels (7-9) in the HSK 3.0 word list.