believe

Many scientists believe that climate change is caused by human activity.

(Chinese) 许多科学家相信气候变化是由人类活动引起的。

I find it hard to believe that he finished the marathon in under three hours.

(Chinese) 我很难相信他在三小时内跑完了马拉松。

He firmly believes in the power of education to change lives.

(Chinese) 他坚定地相信教育改变生活的力量。

If you want to succeed, you must first believe in yourself.

(Chinese) 如果你想获得成功，你必须首先相信你自己。