只有相信自己才可以战胜困难的翻译：Only believe they can overcome the difficulties 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Only believe they can overcome the difficulties

Only then believed oneself only then may overcome the difficulty

Only believe in themselves before they can overcome difficulties

Only believe they can overcome the difficulties