The farther the air is from the fuselage, the faster it moves. That can produce undesirable stress on an engine’s components.
气流通过机身的距离越长，它的速度就越快，会对发动机部件产生不必要的压力。
2
Mental stress activates components of the body's neuro-endocrine system, "which lead to an increased risk of cardiovascular disease," Iso explained.
矶博康博士解释说，精神压力会刺激神经内分泌系统的某些部位，“从而增大患心血管病的几率。”
3
Some believe that the hardened gray iron used to make the components simply "fatigues" with age-as metal parts that go through millions of stress reversals eventually do.