sum
sum/sʌm/ I.n.1.［u］总数，总和: That is the sum of our experience.那就是我们的全部经验。The sum of two and two is four.二加二的和是四。2.［c］金额: a good sum一笔可观的金额The sal···
summarize/summarise
summarize/summarise/ˈsʌməraiz/vt.概括，总结：summarize the meeting ( what I have done)总结/概括会议精神(我已经干的事)These results can be summarized in the following table.这些结···
summary
summary/ˈsʌməri/n.［u］摘要，概要：the summary of the meeting会议摘要；make/give a summary of the report对报告进行概括in summary概括起来：In summary, Chen’s book is a good intr···
summer
summer/ˈsʌmə/n.［c］&［u］夏天，夏季：in summer在夏天；in the summer of 1997在1997年的夏天；during the whole summer在整个夏季里
summit
summit/ˈsʌmit/n.［c］1.最高级会议：summit conference/meeting首脑会议；at the summit在首脑会上2.(山等的)最高点，峰顶：the summit of the mountain山的顶峰3.极点，最重要的事情：the s···
summon
summon/ˈsʌmən/vt.1.召唤：The king summoned all his ambassadors.国王召回了他所有的大使。2.召集：A meeting was summoned immediately.立刻召集了一个会议。They summoned men to defend···
sun/sunny/sunburnt
sun/sʌn/n.1.太阳(常与the连用)：The sun is nearly 150 million kilometres away from the earth.太阳距地球约1.5亿公里。with the sun在太阳升起(落下)时：He gets up (goes to bed) with th···
Sunday
Sunday/ˈsʌndi/n.［c］星期天(一般不加冠词)：on Sunday在星期天；last Sunday上星期天My birthday is on a Sunday this year.我今年的生日是在一个星期天。
sunflower/sunglasses/sunlight
sunflower/ˈsʌnflauə/n.［c］向日葵: The sunflower always turns toward the sun.向日葵一直面向太阳。Sunflowers grow promptly.向日葵生长迅速。sunglasses /ˈsʌnˌglɑ:siz/n. (pl.)太···
sunrise/sunset/sunshine
sunrise/ˈsʌnraiz/n.［u］日出：at sunrise拂晓时分，黎明；see the sunrise看日出；an hour before sunrise黎明前一小时；a spectacular sunrise over the summit of the mountain山顶上壮观···
