CLEANLINESS. Tolerate no uncleanliness in body, cloaths, or habitation.
Every lump of coal we mine keeps the lights on in someone's home.
Courage is resistance to fear, mastery of fear - not absence of fear.
技术应该是无形的。当它运行得最好时,你甚至不会注意到它。
We are all migrants through time.
成功的关键是不断推动自己。