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tinh cuu » trinh cuu, dinh cuu, tinh cua
sac tinh » dac tinh, cac tinh, sat tinh
khoa hoc » hoa hoc
tu sac » tu sach, tu cac, tu san
tinh cuu » trinh cuu, dinh cuu, tinh cua
sac tinh » dac tinh, cac tinh, sat tinh
khoa hoc » hoa hoc
tu sac » tu sach, tu cac, tu san
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