英语求翻译,拜托了,专有名词不翻译,

16.dropped
17.since
18.collect
19.created
20.brushes

译文如下:
译员:Mavis
翻译工作室:mavislee.ganji.com.cn
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It turned out some time during that day, everyone had dropped something on the ground, but since it was covered with waste, whenever anyone dropped anything... it was almost impossible to find it!
经过某天的试验发现,当每个人都往草地乱丢东西时,不管人们是什么时候扔的,因为草地上都铺满了垃圾,几乎找不到一丁点绿地的痕迹了!

The park had to have everyone help to collect rubbish. The visitors swept the ground, singing and dancing all the while. It became so much fun that from that day the created a new activity in the park, in which everyone, armed with brushes and bags, sent a while cleaning, laughing, and dancing.
公园的清洁需要大家共同参与,游客们可以在公园里帮忙清扫,边唱歌边跳舞。这样以后,公园里就会多了一项活动,每个人都拿着刷子和清洁袋,大家都愉快地做收集垃圾,时而舞蹈,有说有笑。来自:求助得到的回答
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第1个回答  2015-01-27
16.顺便。17.自从,多用在现在完成时。19.创造的过去式。20.刷子(牙刷)的n.复数形式