self-stimulation

1. The general story of why we can't in general is because there's no surprise, there's no mock aggression, and also there may be a general deadening of self-stimulation.
   为什么大部分人不能胳肢自己，是因为它在我们意料之内，没有打闹的侵略性，通常这种引自己笑的念头都会嘎然而止。
2. The new strategy aims to help students form the good circle of self-stimulation, self-direction, self-arrangements, self-body-building and self-evaluation.
   使学生逐渐形成自我激发、自我定向、自我规划、自我健身、自我评价的良性循环。
3. Designing a new type of self-stimulation controlled core saturation Petersen coil, made innovative improvements to its control.
   设计了新型的自励可控饱和铁芯型消弧线圈，对其控制方式作了创新性的改进。

noun

1. manual stimulation of your own genital organ for sexual pleasure

   Synonym:    self-abuse