Abde's zero in variant

例句：

1. 1. The new model has several variants to choose from.
   这款新型号有多种变体可供选择。
2. 2. Variants of the disease have been found in different parts of the world.
   这种疾病的不同变体已在世界各地的不同地区被发现。
3. 3. The scientist studied the genetic variations that led to the disease.
   这位科学家研究了导致这种疾病的遗传变异。