翻译和例句：
risk污染可能引起基因变异AIR pollution from iron andsteel mills(钢铁厂) causesgenetic(遗传的) damage which is passed ……
companies that pollute, such as steel plants (钢铁厂). If they aren’t closed, heavily-polluting companies ……
is now a famous and popular culture and sports site. However, it used to be a steel mill (钢铁厂... a famous and popular culture and sports site. However, it used to be a steel mill (钢铁厂) that was built ……
culture and sports site. Before, it used to be a steel mill (钢铁厂) first built in 1919. It once had 60... and sports site. Before, it used to be a steel mill (钢铁厂) first built in 1919. It once had 60,000 workers ……
in 1919. 释义：从前，它曾是始建于1919年的一个钢铁厂。释义：从前，它曾是始建于1919年的一个钢铁厂。点拨：used to be sth 曾经是……；used to do sth 过去 ……
and sports site. However, it used to be a steel mill (钢铁厂) that was built in 1919. In its peak years... culture and sports site. However, it used to be a steel mill (钢铁厂) that was built in 1919. In its peak ……
为一名中共预备党员。入党后，我和其他同学仍然决心继续锻炼。暑假开始后，我们就提出到工厂劳动锻炼。经北京市委批准，我和外文系的部分团员和同学去了二七机车厂，另一部分去了石景山钢铁厂。位于 ……
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