这zhè是shì一yī项xiàng重zhòng要yào的de任rèn务wu。

This is an important mission.

我wǒ完wán成chéng了liǎo今jīn天tiān的de任rèn务wu。

I finished today's tasks.

他tā们men接jiē到dào了liǎo新xīn任rèn务wu。

They received a new assignment.

今jīn天tiān的de任rèn务wu很hěn重zhòng。

Today's task is heavy.

他tā完wán成chéng了liǎo所suǒ有yǒu任rèn务wu。

He completed all the tasks.