brush-pens
plural of downcall
plural of brush-pen
simple past tense and past participle of oxygenate
(organic chemistry) A bond, consisting of a covalent bond between two sulfur atoms, formed by the reaction of two thiol groups, especially between the thiol groups of two proteins
その画家はスケッチのワークショップの前に、旅行用キットにいくつかの筆ペンを詰めた。
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