a表示一种天气 It's a nice weather for hiking today. 今天是远足的好天气。 What a nice weather ! You can't beat it. 多好的天气！再没有比这个更好的了。 Such a nice weather gave us a wonderful trip in south of Spain---Sevilla! 如此美好的天气让我们此次西班牙南部塞尔维亚之旅变得非常精彩！ What a nice weather today! 今日气候大好！
