他求婚成功了。

Tā qiúhūn chénggōng le.

His marriage proposal was a success.

我试了好几次才成功登录网站。

Wǒ shì le hǎo jǐ cì cái chénggōng dēnglù wǎngzhàn.

I tried many times before successfully logging into the website.

我终于成功建立自己的事业。

Wǒ zhōngyú chénggōng jiànlì zìjǐ de shìyè.

I finally succeeded in establishing my own business.