warmth的形容词形式是什么

　　The weather was warm for the time of year.

　　在一年的这个时节这天气算是暖和的了。

　　I could feel the warm sun on my back.

　　我背上感受到了阳光的.温暖。

　　It was a warm day, if not exactly hot.

　　这一天即使算不上热，也是一个暖和的日子。

　　Birds use warm air currents to help their flight.

　　鸟利用暖气流助飞。

　　You're always sure of a warm welcome there.

　　到了那里你肯定会受到热烈欢迎。