他在公司的决策中发挥了重大的作用。

Tā zài gōngsī de juécè zhōng fāhuīle zhòngdà de zuòyòng.

He played a significant role in the company's decision-making.

这是一项重大工程，需要精心筹备和管理。

Zhè shì yī xiàng zhòngdà gōngchéng, xūyào jīngxīn chóubèi hé guǎnlǐ.

This is a major project that requires careful planning and management.

这次会议对我们公司的发展非常重大。

Zhè cì huìyì duì wǒmen gōngsī de fāzhǎn fēicháng zhòngdà.

This meeting is of great significance to the development of our company.