In the early 1980s, a leaking underground storage tank filled

In the early 1980s, a leaking underground storage tank filled with trichloroethane, a solvent suspected of causing reproductive and developmental problems, was found to be contaminating the drinking water of 65,000 people near a semiconductor plant.
我看不懂这个长句。主干是什么？请帮忙翻译并分析一下。谢谢！

early in the morning early in the morning 等于early morning in the early 1970s ------- EARLY和1970S是什么意思 关于“Early in the morning-Cliff Richard”这首歌 清早翻译成 early in the morning.和early morning都可以吗？ my parents work very hard in the farm ,they ____get up early in the morning. 翻译 Haley first discovered the orbital period of the comet in the early 1700's. In early days his clothes were so old that the colours in the material faded over the years. Even in the early morning there is no dew on the grass, and a rainfall is 为什么the late / early morning of 日期要用in啊？