variant angina pectoris

例句：

1. 1.The new model has several variants to choose from.
   这款新型号有多种选择。
2. 2. Variants of the virus have been found in different parts of the world.
   病毒的不同变种已在世界各地的不同地区被发现。
3. 3. The geneticists are working on developing a vaccine for variant strains of the disease.
   遗传学家们正在努力开发针对该疾病不同变种的疫苗。