So, hold out your right hand and look at a star. Because there are atoms from stars that blew up eons ago that landed on this planet, and now they're in your hand.
1.one person's spending is another person's income. 2.spending,income,borrow,debt repayment,productivity 3 rules of thumb 一、不要让债务的增长超过收入 二、不要让收入的增长超过生产率 三、尽一切努力提高生产率