He went out to buy a packet of cigarettes.

他出去买了一包香烟。

《柯林斯英汉双解大词典》

I must buy a packet of cigarettes.

我得买一包香烟。

youdao

For example, a person might want to buy a packet of cigarettes for twenty-five cents.

比如，某人想买一包25美分的烟。

youdao

Ok, so RFID tags - tiny, cheap computer chips - will change the world when they are attached to everything from a tub or margarine to a packet of fags (if, you can still buy those in 10 years' time).

BBC: 10 THINGS WE DIDN'T KNOW THIS TIME LAST WEEK