法律效力的概念对于理解法律的本质至关重要。
The concept of legal validity is crucial for understanding the nature of law.
Risk prevention and control is the guarantee for the steady development of enterprises. We must build a strong dam for risk prevention and control.
我是个幸存者——是一个经历过苦难而且生存下来的活生生的榜样。
The degree of slowness is directly proportional to the intensity of memory. The degree of speed is directly proportional to the intensity of forgetting.