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.

　　地球繞太陽運行一周需要一年的時間。

　　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。