World Asthma Day is on the first Saturday of May, it is a day to call for the public and the patients to pay attention to asthma and master more information of this sickness, so as to make bett...
Our world is colorful.There are many kinds of color like black，pink，white，blue，brown，green，red，gray，purple，yellow and blond。
Spring is green.The flowers are yellow，red and pink...
哥本哈根联合国气候会议 As world leaders are in Copenhagen （哥本哈根）this month，talks about climate change are gathering steam. But is climate change the most pressing threat（威胁）for manki...
