求翻译：李爷爷70岁了，无儿无女，MING知道了这件事，带着同学一起去帮李爷爷干家务，李爷爷很感谢。留他们吃了晚饭，并想给他们一些钱，同学们拒绝并离开了是什么意思？

70-year-old grandfather of Lee, had no children, ming know it, go and the Li grandfather chores with classmates, Grandpa Lee is very grateful. They are to stay to supper, and would like to give them some money, the students refused to leave the

Lee's grandfather, the 70-year-old girl, a child-free MING know this thing, and with students to help them in the household, And my grandfather Lee Lee's grandfather was grateful for. Leave them to eat supper, and want to give them some money, the students have refused and left the

Grandpa Li 70 years old, has been childless, MING had known this matter, leads schoolmate together to help Grandpa Li to do the housework, Grandpa Li thanks very much.Kept them to have the dinner, and wanted to give them some money, schoolmates rejects and leaves

Grandpa Li is 70 years old, no children without women, MING knows it, with classmates to help Grandpa Li to do the housework, Grandpa would like to thank Lee. They ate dinner, and want to give them some money, the students refused and left the

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