One bag per person is allowed.

每人允许带一个袋子。

youdao

Passenger: I'm checking one bag.

乘客：我有一个包要托运。

youdao

I looked forward to those precious weeks when one bag sufficed to meet my needs.

我期盼这这些珍贵的日子，在这些日子里一个包就能满足我的需求。

youdao

The bag is one of the most simple and useful things in the world.

VOA: special.2009.01.25

Day and night I begged my mother and father to take the bag away shaking with terror because no one saw them but me.

我无时无刻不乞求我的父母,指着那些袋子，让他们带走,我怕的发抖,由于除了我再也没人能看到。

耶鲁公开课 - 1945年后的美国小说课程节选

No one can explain how the cat got into the bag.

VOA: special.2009.01.25

Recall, too, during the height of the recession shortages of rice, leading places like Costco to ration one bag per customer.

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According to the plan, she would travel by car into Armenia with one bag for a planned stay of about seven days.

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What most of us do with our rubbish is we throw it into one bag altogether and then it gets picked up once a week.

BBC