过去100年来，天文学家特别注意一类称作“仙王座变光星”的恒星。

For 100 years astronomers have paid particular attention to a class of variable star known as the Cepheids.

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但是，就在同一天，急需现金的存储类芯片巨人Hynix公司的董事会断然拒绝了美国的一家竞争对手——美国美光科技公司——的收购建议，此举令市场大为震惊。

But on the same day, the board of Hynix, a cash-strapped memory-chip giant, shocked the markets by rejecting a proposed takeover by Micron Technology, an American competitor.

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动物主要借助网膜中的两类光感细胞获得视觉：视杆细胞帮助感知亮度，而种类众多的视锥细胞则帮助辨别颜色。

Retinas use two main types of light-sensitive cells to allow animals to see: Rod cells help measure brightness, while various types of cone cells help distinguish colors.

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