In addition, the engines are located on the aft upper surface, providing naturalnoise shielding that makes the configuration quieter during takeoff and landing.
此外,发动机位于后部上表面,提供了自然的噪声屏蔽,使得配置在起飞和着陆期间更安静。
2
Since natural systems have evolved not only to cope with noise but to exploit it, as neurons do with stochastic resonance, could it be that nature has also learned to compute with noise?
Examples range from contamination of the food or water supply, to high levels of air or noise pollution, a chemical accident, a disease outbreak or a natural disaster.