我需要一些邮票。你包里有吗？

I need some stamps. Are there any in your bag?

《牛津词典》

乘长途客运汽车、火车或飞机前，你必须检查你包里的东西，以确保你没有携带任何危险的物品。

Before getting on a coach, a train or a plane, you must have the contents of your bag checked to make sure you aren't carrying any dangerous things.

youdao

麦克：下次你包饺子时叫上我。

Mike: Call me when you're making dumplings the next time.

youdao

You break the seal between them and feel the thing get cold, for example, right.

如果你买了制冷或加热包,你打开它们之间的封条。

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Or, if you are at a party and you're ready to leave but you've left your bag with the host,

又或者，你在一个派对上，你准备要走了，但是你刚才把你的包放在派对主人那里了，

Where 课堂 - SpeakingMax英语口语达人

another thing that you'd find if you looked inside the axon terminals of any of these pre-synaptic membranes, you'd find lots of vesicles or some membrane bound compartments that contain special chemicals called neurotransmitters.

如果你仔细观察,突触前膜的轴突末梢内部,你会发现很多小泡,即膜包被的结构,包含有称为神经递质的特殊化合物

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