语言手法
紧扣GSE 40-49级别要求,善用基础但精准的衔接手段(not just... but..., while, To turn..., first, In addition, Therefore, by doing),确保文气贯通。句式上主从复合句与简单句穿插,被动语态(be kept away, are recycled)与情态动词(should, ought to, can)交替使用,既体现客观性又明确建议语气。词汇选择贴近生活且具时代感(categories, educational campaigns, reduce pollution),无生僻词堆砌,符合初中生表达习惯与能力区间。