patchy的副詞形式是什么

　　例句：

　　It was a patchy performance.

　　那是一場素質不齊的演出。

　　The evidence is patchy.

　　證據(jù)不充分。

　　The signs of improvement are patchy, however.

　　然而，這些好轉的跡象并不平衡。