无偿工作的价值在经济衡量中常常不可见,但它却是社会的支柱。
The value of unpaid work is often invisible in economic measures, yet it is the backbone of society.
If you can avoid seeking approval of others, your power is limitless.
密码学是将信息转换成一种形式,使任何没有解锁密钥的人都无法理解的艺术。
用户需求是产品开发的出发点,也是落脚点。