When you have to kill a man it costs nothing to be polite.
自然是无情且不可改变的,它不在乎其隐藏的原因和行为是否能为人类所理解。
In mathematics, the most profound ideas often arise from the simplest observations.
没有行动的数据只是噪音;农民需要的是工具,而不仅仅是信息。
The good which a wise man seeks, the wise man is.