所谓经济危害水平,这是一个临界的害虫密度,在这个密度时实施人工防治的成本刚好等于由于防治而得到的经济效益。
报警、显示及通讯,对于最大程度地减少危害,提高楼宇中安全水平有着重要的现实和经济意义。
The alarm display, reaches communication, the field cuts down damage to maximal degree, safety is horizontal in raising the building world have important reality and economy significance.
在我国,由于税制不健全、征管水平比较低以及纳税人依法纳税意识淡薄,偷逃税问题更是极为严重,给国家经济秩序和税法体制造成了很大的危害。
In our country, evading taxes is much more serious because of the less sound tax system, the low level of collecting and management and the light consciousness of paying taxes for the tax payer.
应用推荐