他在众人面前讲了自己的故事。

Tā zài zhòngrén miànqián jiǎng le zìjǐ de gùshi.

He told his story in front of everyone.

在众人面前讲话，他有点紧张。

Zài zhòngrén miànqián jiǎnghuà, tā yǒudiǎn jǐnzhāng.

He feels a bit nervous speaking in front of everyone.

他在网上向众多网友介绍自己的国家。

Tā zài wǎngshàng xiàng zhòngduō wǎngyǒu jièshào zìjǐ de guójiā.

He introduced his country to many netizens online.