例句：

　　It was a patchy performance.

　　那是一場(chǎng)素質(zhì)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(zhuǎn)的跡象并不平衡。