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twenty; 20
It takes twenty minutes to get to my house.
A burden, charge, or responsibility.
This project is a big burden for me.
duplicity, being two-faced or double-dealing
I was shocked when his duplicity became apparent.
(archaic, possibly obsolete) two days, a two-day period
The two-day trip was very enjoyable.
Kyūjitai form of 双子: twins
My friend has twin brothers.
(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.
dignified / undignified; lacking in dignity / fill, line up
He is a dignified person named Bi.
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