Technology is transforming coal mining from a brute force industry to a precision operation.
譯文 ：防御欲念好比牽挽逆水而行之船，剛一歇息，船就要向下游漂流；努力向善好比攀爬沒有樹枝的大樹，剛一歇腳，身體就要下滑。因此，君子的內(nèi)心無時無刻不是處在警惕之中
The choice for mankind lies between freedom and happiness and for the great bulk of mankind, happiness is better.