selfcostn.成本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-observation自我观察self timer release自拍掣self-drive motor自起动电动机self - education自我教育self-check digit自核准, 自核对self-oscillating自激振荡self-exuberation自我耽溺self-deprecation自我贬低，自黑self-cloclockingn.自动计时 ; 自同步self-irradiation自辐照