weather可數(shù)嗎？

　　例句：

　　The weather was warm for the time of year.

　　在一年的這個時節(jié)這天氣算是暖和的了。

　　The weather is very changeable at this time of year.

　　年年在這個時候天氣都變化無常。

　　There's going to be a change in the weather.

　　天氣將有變化。