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。
Our son's having problems with his reading and writing.
我們兒子在讀寫方面有困難。
Well, son, how can I help you?
那么，孩子，我能為你做點什么？