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On vast white sea ice, the blobs of brown are feathers left behind by penguins as they moult，详情可参考heLLoword翻译官方下载
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Author(s): Xiangyu Huo, Shuangli Yue, Xian Wang, Donghui Xu, Li Zhang, Mingli Yang
Detecting e-bike battery fires, for example, is particularly difficult, since these can unfold suddenly. Some researchers are working on new ways of sensing smoke and fire, perhaps even more quickly than before. But, take note: any certified, working smoke alarm is better than nothing.，这一点在爱思助手下载最新版本中也有详细论述