Precycling is the practice of reducing waste by attempting to avoid bringing into the home, business items which will generate waste.

Precycling（“预循环”或“提前循环”）指通过避免购入会产生垃圾的家庭或商业物品来减少垃圾数量的行为。

The original three-pronged push for trash management is "Reduce, Reuse, Recycle." Precycling emphasizes "reducing and reusing", while harnessing the momentum and popularity of the term "recycle."

垃圾管理最初的三个方针是“减量、再利用、再循环”。这里的预循环强调的就是“减量和再利用”，称为precycling其实是为了借助recycle（再循环）的热度和普及程度。

Precycling includes such practices as buying consumables in bulk to reduce packaging, buying consumables in recyclable over non-recyclable packaging, avoiding junk mail, and using electronic media for reading materials, especially throwaway items such as magazines or newspapers.

“预循环”的做法包括：批量购买消费品以减少包装数量，选择购买外包装为可循环物质的消费品，避免垃圾信件，用电子媒体阅读，此项尤其适用于杂志、报纸等看完就扔的阅读载体。

One way to participate in precycling is to carry a "precycling kit". Include a non-disposable container, silverware set, a cloth napkin or handkerchief, and a thermos or water-bottle within a cloth bag that can double as a grocery/shopping bag.

参与“预循环”的另一个方式就是随身携带一个“预循环箱”。里面有非一次性的容器，银制餐具，布质餐巾或手帕，以及装有保温杯或水杯的布袋。这个布袋打开后还能当购物袋用。