Without worrying about the economics of it a second, how would we find that just as a math exercise?
不需要考虑经济学的理论,用数学的方法怎么来求解啊
You remember they're wandering around the forest without her picking berries. The younger brother, - the second brother, is most concerned about his sister's safety -- so I want you to look at this passage.
你们记得他们在树林中游荡,没有拿他们采摘的果子,小哥哥,也就是二哥哥,是最关心他妹妹安全的-,所以我想让你们看这篇文章。
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