Plastics are usually marked with an identification code that shows a recycling symbol and a number from 1 to 7.

塑料通常标有一个标识码，上面有一个回收符号和一个从1到7的数字。

youdao

After much deliberation, it found no ethical reason to oppose recycling heat despite the ICF code.

经过仔细考量之后，该学会发现除了ICF的条款以外，并无其他理由可以反对热量的回收利用。

youdao

These codes do not necessarily mean that a container is recyclable since there may not be a recycling market for a particular code.

这些符号并不意味着一个容器一定是可以回收的，因为可能对某种特定的材料来说并滑回收市场。

youdao

Where possible, use only plastic containers denoted by a code 2 (polyethylene) or code 5 (polypropylene) in their triangular recycling symbols.

ECONOMIST: The plastics industry��s Pyrrhic victory

The British Metal Recycling Association has launched a voluntary code of practice as part of its efforts to reduce the number of thefts but as the price of copper continues to rise, illegal ways of obtaining the metal will continue.

BBC: Police target ?770m worth of metal cable thefts