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(organic chemistry) phthalein
In the organic chemistry experiment, we used phthalein as an indicator.
(organic chemistry) naphthalene
Naphthalene is a compound often used in organic chemistry.
In this experiment, we will observe the crystallization of naphthalene.
(organic chemistry) phthalazine
Phthalazine is a compound often used in organic chemistry.
双子座, ふたご座: Gemini (constellation)
My zodiac sign is Gemini.
Gemini (constellation)
He was born under the sign of Gemini.
double; dual
They are twin brothers.
(dated) tunnel
This old tunnel was once used in a mine.
(obsolete) Alternative form of 隧道 (zuidō, “tunnel”)
This old tunnel was once a key point of transportation.
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