英语翻译：自信是很重要的。

自信是很重要的，英语翻译是：Confidence is very important.

详细解释：
confidence 英[ˈkɒnfɪdəns] 美[ˈkɑ:nfɪdəns]
n. 信心; 信任; 秘密;
adj. 骗得信任的; 欺诈的;
[例句]I have every confidence in you.
我完全相信你。

very 英[ˈveri] 美[ˈvɛri]
adj. 很，非常; 恰好是，正是; 十足的; 特有的;
adv. 很，非常; 充分，完全;
[例句]She's not very impressed with them.
她对他们没什么印象。

important 英[ɪmˈpɔ:tnt] 美[ɪmˈpɔ:rtnt]
adj. 重要的; 权威的; 有势力的; 有地位的;
[例句]Her sons are the most important thing in her life.
她生命中最重要的是她的儿子们。

Self-confidence is very important.
It is very important to be self-confident.

Self-confidence is very important.
Self-confidence is of great importance.

Self—confident is tremendously important.

It's very important of self-confidence.