书籍 Four Corners 2 - 第 11 单元 B 课

the act of putting an idea or plan forward for someone to think about

背书

to mention an idea, proposition, plan, etc. for further consideration or possible action

建议某事

used to show the possibility of something happening or being the case

可以

a competition in which participants compete to defeat their opponents

竞赛

an area or environment that is located outside, typically in nature or in the open air

户外的

happened or existed most recently in terms of time or order

以前的