例句：

　　The wind will freshen tonight.

　　今夜風(fēng)力將加大，氣溫下降。

　　The wind has changed direction.

　　風(fēng)向已經(jīng)變了。

　　The plane disappeared behind a cloud.

　　飛機(jī)消失在云層里。

　　Fog and low cloud cover are expected this afternoon.

　　預(yù)計今天下午有霧和低空云層。