The Shark vs. Roomba debate is old news. Here's how both robot vacuum brands got dethroned.
也是时候想一想，我们到底想要什么样的邮轮？是复制欧美的成熟模式，还是探索属于中国人的“航海生活”？
。heLLoword翻译官方下载对此有专业解读
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New analysis of Apollo Moon samples finally settles debate: « For decades, scientists have argued whether the Moon had a strong or weak magnetic field during its early history (3.5 - 4 billion years ago). Now a new analysis shows that both sides of the debate are effectively correct. »
· 马琳 · 来源：tutorial资讯