求翻译：　长期以来，我国在生产干电池时，要加入一种有毒的物质———汞或汞的化合物。我国的碱性干电池中的汞含量达1～5%，中性干电池为0.025%，全国每年用于生产干电池的汞就达几十吨之多。是什么意思？

China in the production of dry batteries, to join a toxic substance - the mercury or mercury compounds. The mercury content in alkaline batteries in China amounted to 5%, 0.025% neutral dry-cell batteries, nationwide mercury reached as many as dozens of tons a year for the production of dry batterie

For too long, my battery in the production, when you want to add to a toxic substance -- mercury or mercury compounds. Our alkaline batteries in the mercury UP TO 1 to 5 per cent of the dry, and 0.025 % for a year, the country is used in the production of mercury batteries for up to several tons of

　Long, dry battery production in China, to join a toxic substance---mercury or mercury compounds. 1~5% of mercury content in alkaline dry battery, neutral dry battery for 0.025%, each year dozens of tons of mercury used in the production of dry batteries.