There is a pen in the bag
书包───a bag;钢笔───Pen
She ate a bag of chips.───她吃了一袋炸土豆条。
She packed her few belongings in a bag and left.───她把她的几件东西装进包里便离开了。
Here's your change. Would you like a bag?───这是找给您的零钱。您要个袋子吗？
The big Klaus went into a bag with rocks to reach the bottom of the river as fast as possible.───大克劳斯钻进口袋，为了能尽快沉到河底还在口袋里装了些石头。
I take out a bag of candy from my backpack and hold it out to the children.───我从背包里拿出一包糖分给孩子们。
She was wearing a thin dress. She was holding a bag of sweets. She had nothing else. Her arms and legs hurt a bit, but she could walk.───她穿着很薄的裙子，拿着一袋糖。她没有其他东西了。她的胳膊和腿有一点疼，但还能走路。
He stole a bag from the room.
He hastily stuffed a few clothes into a bag.
He bought me a bag of toffees.
Mother poured sugar out of a bag into a pot.
I put a few personal belongings in a bag.