欢乐与忧伤
【内容提示】
请你就“欢乐与忧伤”这一命题，写一篇英语说明文。
内容要点如下：
①生活中，苦与乐像影子一样与我们结伴而行。
②在永恒的自然中，快乐是动力，推动世界前进。
③愉快的人与别人分享欢乐，从善待别人中得到满足。
④苦是自找的。追逐名利的人永远没有欢乐，而只有痛苦。
⑤忌妒、报复心和虚荣心也是痛苦的根源。它们存在于人们的想象之中。
⑥要快乐就必须排除欲望和想象所导致的痛苦。
【作文示范】
Joy and Sorrow
In our life, joy and sorrow are like shadows that follow and go along with us. Sometimes we are in joy. Sometimes we are in sorrow. At times we cannot tell joy from sorrow.
What is joy? In the nature that is going on forever, joy is a driving power, which pushes the world fo
