Question

read the excerpt from \daughter of invention\. \ya - ya!\ she waved them out of her room at last. \there is no use trying to drink spilt milk, thats for sure.\ what does laura mean to express to her daughters? she wants her daughters to learn from her mistakes. she does not want to dwell on something that cannot be changed. she intends to invent many more useful things she can patent. she wishes that she had been the one to patent the suitcase with wheels.

Explanation:

Laura says "There is no use trying to drink spilt milk", which is an idiom meaning it's no use dwelling on past mistakes or things that cannot be changed.

Answer:

She does not want to dwell on something that cannot be changed.