你每花一块钱购买一些实质性的东西,预计在其寿命结束时要支付一块钱的维修、保养或处理费用。
For every dollar you spend purchasing something substantial, expect to pay a dollar in repairs, maintenance, or disposal by the end of its life.
真相往往比小说更离奇。
任何圆的周长与其直径的比率小于3 1/7但大于3 10/71。