坚信的英文：
firmly believe

参考例句：

We are confident that we can reach that goal ahead of schedule.
我们坚信可以提前完成。

The rite of confirmation
【基督教】坚信礼

I asseverate my innocence.
我坚信自己是无辜的。

an idea steadily gaining credence
逐步得到坚信的观念

He remained steadfast in his belief that he had done the right thing.
他一直坚信自己做得对。

The young people today cleave to the idea of republicanism
当今的年轻人坚信共和思想。

He is firmly under the belief that there is life after death.
他坚信死后仍有生命。

We were convinced of the righteousness of our cause.
我们坚信我们的事业是正义的。

We firmly believe that our just cause will succeed.
我们坚信我们的正义事业必定胜利。

They were the first to believe firmly in the supremacy of free inquiry.
他们首先坚信自由探究的至高无上性。

firmly是什么意思：
adv. 坚固地；稳固地；坚定地；坚决地

Grasp the thistle firmly
毅然处理困难局面

The struts are firmly braced.
那些支柱上得很牢固。

The tables are firmly fixed to the floor.
这些桌子被牢牢地固定在地上。

She knotted the parcel firmly.
她把那个小包扎得很紧。

v. to secure or fix something firmly
使某物牢固

believe是什么意思：
v. 相信，认为

Believe not all you hear, tell not all you believe.
言不可尽信，信不可尽言。

I believe they will be on at that time.
我相信他们到时候会同意的。

He does not believe in portion.
他不相信命运。

Believe no tales from the enemy
切莫轻信敌人

I believe in Christianity.
我信仰基督教 。