在许多国家，再生资源的回收利用已经成为一个十分重要的产业。
In many countries, recycle of renewable recourses has become a very important business.
其次，随着世界不可再生资源的逐渐减少，回收利用日益重要。
The second was the growing importance of recycling as the world's nonrenewable resources run down.
再生资源回收利用的种类与数量的多少、回收率的高低，科学技术是决定因素之一。
Scientific technology is the main factor in deciding the kinds, amounts and high or low rate of recovery.
而当今如易拉罐等废旧铝材丢弃量很大，即令回收利用其层次也不高。不仅造成了环境污染，也浪费了这一宝贵的可再生资源。
Nowadays many cans are dumped, the level of recycling is low, which not only pollutes the environment, but wastes the useful recycling resource.
能使更多的废品能再生资源回收利用。
能使更多的废品能再生资源回收利用。
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