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话题词汇 1.mystery n.谜 2.puzzling/strange/weird adj.奇怪的 3.witness v.见证 4.give an explanation解释 5.result in/lead to导致 6.by accident碰巧 经典语篇 某论坛开设了一个主题为“Tales of the unexplained”的专区。请你根据以下信息，写一篇150词左右的短文，发表在论坛上 。 名称：报时怪石 位置：澳大利亚中部的沙漠 高度：348米 现象：能够有规律地改变颜色，早上为棕色；中午为灰蓝色(dusty blue)；下午为红色。 注意：可适当增加细节，使行文连贯。 佳作欣赏 Have you ever heard of a rock which can tell time? There is one with the height of 348 meters.① The rock just lies in a desert in the middle of Australia.② Its color can alter regularly in a day，and it makes people puzzled about it.③ It’s brown after sunrise in the morning.Interestingly，it turns dusty blue at noon.④ However，in the afternoon，it’s weird that red will appear on its surface. Scientists have been studying this amazing phenomenon for long but nobody has been able to explain how this happens.⑤ In the future，perhaps scientists can find out the exact reason. | 
