甚至连澳大利亚、加拿大这两个利用“计分制度”招揽技术工人的国家，也减少了国外工人的工作许可证。

Even Australia and Canada, which pioneered the "points system" to give preference to skilled workers, have cut back on work permits.

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排污许可证制度作为一项环境管理制度早已确立，但在我国一直未得到很好实施，许多工作处于摸索阶段。

Permit system of pollutant discharged has been carried out for a long time. While it did not implemented very well, there are many reasons which still are under studied.

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