gōng yuán / bǎo liú / le / zhè piàn / huāng dì / rèn qí zì rán / de / yǎn biàn / chéng / yí kuài / xiǎo xíng / shī dì

公园保留了这片荒地，任其自然地演变成一块小型湿地。

The park preserved this patch of wasteland and let it naturally develop into a small wetland.