sun的形容詞詞是什麼？

例句：

He could feel the heat of the sun on his back.

他能感覺到太陽照射在背上的熱度。

The sun was already up when they set off.

他們出發時太陽已經升起了。

I could feel the warm sun on my back.

我背上感受到了陽光的溫暖。

The earth takes a year to make a circuit of the sun.

地球繞太陽執行一週需要一年的時間。

The trees form a natural protection from the sun's rays.

樹木起天然的`保護作用，遮擋了陽光的照射。