务必的英文：
must
need to
be sure to

Safety helmets must be worn
请务必戴安全头盔

Remember to throttle down before you go round a sharp corner.
务必记住，急转弯前要减速。

Resolve to perform what you ought; perform without fail what you resolve.
应该做的决心做，决心做的务必做。

Make sure you do your stint; do not leave it all to the others.
务必要把分配给你的定量做完，不要都留给别人做。

see to it that...make sure that...
一定注意到...;务必...

You're urged to attend.
请你务必出席。

You cannot fail to see it.
你务必去看看。

Be cool and steady
务必稳静

Do come round and see us some time.
务必抽空来坐坐。

Musks must be worn
请务必戴面罩

We must act, we must act quickly.
我们必须行动，立即行动。

You must synthesise various opinions.
你必须综合各方面的意见。

You must not relax your efforts.
你不可以松懈你的努力。

We need to provide for everything we will need for the trip.
我们必须准备所有旅行要用的东西。

You need money and time, in addition, you need diligence.
你需要金钱和时间，此外你还需要努力。

Do you need to wee?
你要撒尿吗？

brassard: "Sure, sure."
布拉萨尔:“当然，当然。”

Make sure you get there in time.
一定要准时到达那里。

Be sure not to let the truth slip.
千万别把真相泄漏出去。