it is one's belief that

例句：

1. 1.I have a strong belief in the power of education.
   我坚信教育的力量。
2. 2. The scientist has a firm belief in the possibility of space travel.
   这位科学家对太空旅行的可能性持有坚定的信念。
3. 3. She believed that her plan would work.
   她相信她的计划会奏效。