series and parallel

例句：

1. 1. The series of events led to the discovery of a new planet.
   一系列事件导致了新行星的发现。
2. 2. The scientist conducted a series of experiments to test his hypothesis.
   科学家进行了一系列的实验来测试他的假设。
3. 3. The series of books covers various topics in science and technology.
   这一系列书籍涵盖了科学和技术的各种主题。
4. 1. The two buildings are parallel to each other.
   这两栋建筑彼此平行。
5. 2.The two roads are parallel to each other.
   这两条道路彼此平行。
6. 3. The two cultures are parallel to each other.
   这两种文化彼此平行。