一个测量可用的常识：手臂伸直两测指尖的距离就是你的身高。
Handy measure: the distance between your fingertips of your outstretched arms at shoulder level is your height.
The meaning of a word is not a mental entity， but a social practice.
We hope to use technology to help more people be seen and more voices be heard.
伟大的领导者不仅仅是管理；他们激励、鼓舞并提升周围的人。
