self-assured 与 confident 有什么区别?

没什么大区别.self-assured 比confident更具体一些.
例句：You're quite shy and you aren't very confident.
你很害羞,不够自信.
A person of impressive skill and daring,especially one who is highly successful and self-assured.
艺高胆大之人,尤指极为成功或自信的人