That is to say, it was evidently impossible that the situation could be restored to its pre-pollution state in a short time, and it was estimated that the groundwater would only return to standard levels of water quality through natural recovery sometime around 2025.
也就是說，短時間內要將地力恢復到未污染前的狀況，幾乎是不可能的，估計藉由自然修復，要到 2025 年地下水水質才能回復到一般標準。