微课脚本：Let’s Protect Nature Together!**时长：3分钟场景：公园旁白（ cheerful tone）:"Nature gives us fresh air, beautiful scenery, and a happy home. But what happens when we forget to protect it?"路人A（皱眉，指向垃圾）:"Excuse me, sir! You dropped your trash. The bin is just over there!"男子（ dismissive）:"It’s just a little trash. The cleaners will handle it."路人B（严肃但礼貌）:"Small actions add up. If everyone litters, our park will turn into a dump. Let’s keep it clean for everyone!"旁白（ earnest）:"One piece of trash can harm wildlife, pollute water, and ruin the beauty we all enjoy. Protecting nature starts with simple steps!"（男子捡起垃圾，走向垃圾桶。路人微笑。画面出现标语: "Protect Nature—It’s Everyone’s Duty!"）旁白（ upbeat）:"Next time, will YOU be the one to act? Share how you’ll help—use bins, join clean-ups, or remind others. Together, we make a difference!"（公园恢复洁净，众人欢笑。背景音乐渐弱。）Key Message:个人责任 × 集体行动 = 健康的地球。（3分钟精准传递！）