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。