为了安全起见，大家务必遵守这些规定。

Wèile ānquán qǐjiàn, dàjiā wùbì zūnshǒu zhèxiē guīdìng.

For safety’s sake, everyone must follow these rules.

明天的会议你务必准时参加。

Míngtiān de huìyì nǐ wùbì zhǔnshí cānjiā.

You must be sure to attend tomorrow’s meeting on time.

请务必在本周内完成这份报告。

Qǐng wùbì zài běn zhōu nèi wánchéng zhè fèn bàogào.

Please be sure to finish this report within this week.