Yes, one pack per day.

有，一天一包。

youdao

The composition, preparation and synthesis mechanism of the one pack self crosslinking aqueous polyurethane dispersion has been reviewed.

叙述了单组分自交联水性聚氨酯分散体的组成、制备及合成机理。

youdao

One had to quit abruptly on a given day, going from about a pack a day to zero.

吸烟者必须从某天开始突然戒烟，从一天一包烟到再也不抽烟。

youdao

which is like, what, 12 bucks, 12 dollars for one pack of cigarettes, man.

这就是差不多是，十二美元一包烟，对，十二美元一包烟，天呐。

生活费很高 - SpeakingMax英语口语达人

A man, who we will read later this semester, named Thomas Hobbes, was one who led the pack, led the charge.

我们在学期稍后，就会读到的一位名叫贺伯斯的人，他领众将猛攻。

耶鲁公开课 - 政治哲学导论课程节选

Two studies found that beta-carotene supplements increased the risk of lung cancer in people who smoked more than one pack a day and drank heavily.

CNN: Vitamin E may protect lungs

For all these reasons, some women already try to achieve the same effect as Seasonale by taking one pack of regular oral contraceptives straight after another.

ECONOMIST: Controlling menstruation

The one expansion pack I would be most interested in is a more fleshed out story for Songbird.

FORBES: 8 Ways Irrational Could Continue BioShock: Infinite's Story in DLC