If you tell about something that was supposed to be a secret, we say you let the cat out of the bag.

VOA: special.2009.09.27

Instead, he paused for a moment and said, "I would marry a donkey " and a big bag of peanuts."

不过出乎意料的是，他想了一会说，“我想娶一只驴子,和一大包花生“

耶鲁公开课 - 心理学导论课程节选

Of course you guys are savvy enough to know this, but a lot of people get fooled because many people believe that a serving is what's ever in a bag, or a bottle, or a box, and they don't look and see how many servings are actually in it.

大家很聪明,当然看得懂,但还是很多人搞不清它的含义,因为很多人认为所谓一份食物就是指,一包,一瓶或一盒内的食物总量,而没看清整个包装内实际上有几份食物

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

A company based in the United States called GrainPro makes another kind of airtight bag.

VOA: special.2011.02.01

Then cover the top of the pot with a see-through plastic bag.

VOA: special.2011.04.26

The toilet is a single-use bag made of environmentally friendly plastics.

VOA: special.2010.03.15

Each 23 kilogram bag of oysters he receives has a tag that marks the area it came from.

VOA: standard.2010.05.08

Mpyisi says the union is a mixed bag of failed states, countries struggling with democracy, and success stories.

VOA: standard.2009.07.02