brown dwarfs
one who participates in ice swimming
Relating to Johann Heinrich Pestalozzi (1746-1827), Swiss teacher, or especially his system of elementary education incorporating manual training
a fighter, duelist.
plural of brown dwarf
天文学者たちは、近くの恒星を公転するいくつかの褐色矮星を発見し、惑星形成の従来のモデルに挑戦しました。
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