selfholdn.自锁(自保；自动夹紧)selfn.自己；本性；自我pron.我自己；你自己；他或她自己adj.始终如一的；同一类型的；性质不变的v.近亲繁殖；自花授粉self-destroying fuse自毁引信self heated thermistor自热式热敏电阻selfactuated regulator测量元件控制调节器self-conscious evade自觉回避self-defined control自定义控件self-supporting rock自支护岩石self quenched detector自猝灭检波器self excited generator自励发电机,自激发电机self-synchronizationn.自动同步；自同步self-perperpetuationadj.使自身长存不废的 ; 恋栈的；想尽办法保留自己官职的

1. This paper presents the analogized methods and the active control experiments of the cabin noise for a propeller airplane.
   本文介绍螺桨飞机舱内噪声的地面模拟方法和主动控制实验。
2. Three kinds of new viscoelastic damping materials are applied in railway vehicles to reduce internal noise.
   三种新型粘弹性阻尼材料应用于铁路车辆降低车内噪声。