He says that time spent by divers in the water is critical in terms of research costs and the threat of nitrogen narcosis. 他说，就研究费用和氮麻醉的威胁来说，潜水员在水中的时间是至关重要的。
Deep-sea divers can suffer nitrogen narcosis from breathing air under high pressure. 深海潜水者会因在高压下呼吸而出现氮麻醉。
