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(mathematics) pure mathematics
He is passionate about researching pure mathematics.
jewelry box
She opened the jewelry box and found a new necklace.
gemology
He is an expert in gemology, and he is good at evaluating the quality of diamonds.
(literary) they (about women or girls)
They (referring to women or girls) are my best friends.
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DiQt（ディクト）
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★★★★★★★★★★
