n
- ① 避孕(法)
- safe, easy methods of contraception安全简易的避孕法
词路径
- entity
- abstraction
- abstract entity
- psychological feature
- event
- act
- deed
- human action
- human activity
- activity
- preparation
- readying
- planning
- birth control
- birth prevention
- family planning
- contraception
- contraceptive method
上位词
- birth control
- birth prevention
- family planning
下位词
- oral contraception
- surgical contraception