one-way
/ˈwʌnˈweɪ/adjective
1- moving or allowing movement in one direction only单向的：
a one-way valve.
单向阀。
1.1
- (of a road or system of roads) along which traffic may pass in one direction only（道路或道路系统）单向行驶的。
1.2
- (of a ticket) allowing a person to travel to a place but not back again; single.（票）单程的。
1.3
- (of glass or a mirror) seen as a mirror from one side but transparent from the other（玻璃或镜子）单面透明的。
1.4
- denoting a relationship in which all the action or contribution of a particular kind comes from only one member单方面的：
interaction between the organism and the environment is not a one-way process.
有机体和环境的相互作用并非一个单方面的过程。